Conference Agenda

Topical Meetings and Sessions:

TOM 1 - Silicon Photonics and Guided-Wave Optics
TOM 2 - Computational, Adaptive and Freeform Optics
TOM 3 - Optical System Design, Tolerancing and Manufacturing
TOM 4 - Bio-Medical Optics
TOM 5 - Resonant Nanophotonics
TOM 6 - Optical Materials: crystals, thin films, organic molecules and polymers, syntheses, characterization and devices
TOM 7 - Thermal radiation and energy management
TOM 8 - Nonlinear and Quantum Optics
TOM 9 - Optics at Nanoscale (ONS)
TOM 10 - Optical Microsystems (OMS)
TOM 11 - Waves in Complex Photonic Media
TOM 12 - Optofluidics
TOM 13 - Ultrafast Optical Technologies and Applications
TOM 14 - Advances and Applications of Optics and Photonics
EU Project Session
Early Stage Researcher Session organised by SIOF
Grand Challenges of Photonics Session

More information on the Topical Meetings

Select a date or location to show only sessions at that day or location. Select a single session for detailed view (with abstracts and downloads when you are logged in as registered attendee). Plenary speeches, tutorials, and Early Researcher session will be updated very soon. Thank you for your patience!

Please note that all times are shown in the time zone of the conference. The current conference time is: 18th Aug 2022, 19:53:28 CEST

 
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Session Overview
Location: Aula 1
1st floor
Date: Monday, 13/Sept/2021
8:15 - 10:30TOM13 S01: Ultrafast: New trends in ultrafast photonics
Location: Aula 1
Session Chair: Lucile Rutkowski, Institute of Physics of Rennes, France
 
8:15 - 8:45
Invited
ID: 391 / TOM13 S01: 1
TOM 13 Ultrafast Optical Technologies and Applications

Machine learning: a new tool for ultrafast photonics applications

Goery Genty

Tampere University, Finland

In this talk, we review the recent developments in machine learning applications to ultrafast photonics with emphasis on the study of complex dynamics and transient instabilities.



8:45 - 9:00
ID: 430 / TOM13 S01: 2
TOM 13 Ultrafast Optical Technologies and Applications

Neural network prediction of supercontinuum generation dynamics

Lauri Salmela1, Mathilde Hary1,2, John M. Dudley2, Goëry Genty1

1Tampere University, Finland; 2Institut FEMTO-ST, Université Bourgogne Franche-Comté CNRS UMR 6174, France

We introduce a new approach based on two neural network architectures for mimicking the nonlinear propagation dynamics of ultrashort pulses in optical fibers for supercontinuum generation, allowing for significant memory and speed improvements compared to the conventional approach of numerically integrating the generalized nonlinear Schrödinger equation.



9:00 - 9:15
ID: 168 / TOM13 S01: 3
TOM 13 Ultrafast Optical Technologies and Applications

Robust self-referenced Generator of programmable multi-millijoule terahertz-rate Bursts

Vinzenz Stummer1, Tobias Flöry1, Edgar Kaksis1, Audrius Pugzlys1,2, Andrius Baltuska1,2

1TU Wien, Austria; 2Center for Physical Sciences & Technology, Lithuania

We demonstrate a technique for the programmable generation and multi-millijoule amplification of ultrashort pulse bursts, which can be applied to any master-oscillator regenerative-amplifier system with very low implementation complexity and high stability in burst-mode operation.



9:15 - 9:30
ID: 329 / TOM13 S01: 4
TOM 13 Ultrafast Optical Technologies and Applications

Mid-infrared laser filaments for local modification of atmospheric aerosol densities

Valentina Shumakova1,2, Elise Schubert3, Skirmantas Alisauskas1, Denis Mongin3, Mary Mattews3, Tadas Balciunas3, Audrius Pugzlys1,4, Jerome Kasparian3, Andrius Baltuska1,4, Jean-Pierre Wolf3

1Photonics Institute, TU Wien, Austria; 2University of Vienna, Faculty of Physics, Faculty Center for Nano Structure Research, Christian Doppler Laboratory for Mid-IR Spectroscopy and Semiconductor Optics, Austria; 3GAP, Université de Genève, Switzerland; 4Center for Physical Sciences & Technology, Lithuania

Laser-Induced Aerosol Formation (LIAF), driven by UV and near-IR filaments, relies on the nitrogen photo-oxidative chemistry, triggered by photoionization and leading to the production of HNO3, stabilizing the growth of aerosol. Mid-IR filaments were expected to be less efficient due to their lower photoionization rates. However, we observed surprisingly high yields of aerosols, generated by mid-IR laser pulses, which cannot be fully explained by the HNO3-pathway. Therefore, we suggest a new mechanism of LIAF, based on the resonant excitation of volatile organic compounds, enabled by the spectral broadening during filamentation.



9:30 - 9:45
ID: 392 / TOM13 S01: 5
TOM 13 Ultrafast Optical Technologies and Applications

Ultrafast pulse-shaping modulates perceived visual brightness in living animals

Geoffrey Gaulier1, Quentin Dietschi2, Swarnendu Bhattacharyya3, Cedric Schmidt1, Matteo Montagnese1, Adrien Chauvet1, Sylvain Hermelin1, Florence Chiodini4, Luigi Bonacina1, Pedro L. Herrera5, Ursula Rothlisberger3, Ivan Rodriguez2, Jean-Pierre Wolf1

1Group of Applied Physics, University of Geneva, Switzerland; 2Department of Genetics and Evolution, University of Geneva, Switzerland; 33Institute of Chemical Sciences and Engineering, Ecole Polytechnique Fédérale de Lausanne, Switzerland; 4Biobanque de tissus thérapeutiques, Department of Diagnostic, University Hospitals of Geneva, Switzerland; 5Department of Genetics Medicine and Development, University of Geneva

Experiments on molecules in solution showed that the first step of vision consists in an ultrafast photo-isomerization that can be coherently controlled by femtosecond pulse shaping. Here, we measure the electric signals fired from the retina of living mice upon femtosecond multi-pulse and single-pulse visual stimulation. We show that the electrophysiological response is sensitive to the manipulation of the pulse spectral-phase and the control mechanism relies on multiple interactions in proximity of the conical intersection, leading to pump-dump and pump/re-pump processes. Our interpretation is supported by quantum dynamics simulations.



9:45 - 10:00
ID: 449 / TOM13 S01: 6
TOM 13 Ultrafast Optical Technologies and Applications

Long distance laser filamentation using Yb:YAG kHz laser

Pierre Walch1, Benoît Mahieu1, Magali Lozano1, Yves-Bernard André1, Laurent Bizet1, Ugo Andral2, Victor Moreno2, Thomas Produit2, Clemens Herkommer3, Robert Bessing3, Thomas Metzger3, Jerôme Kasparian2, Jean-Pierre Wolf2, André Mysyrowicz1,4, Aurélien Houard1

1Laboratoire d’Optique Appliquée – ENSTA, Ecole Polytechnique, CNRS - 828 boulevard des Maréchaux, 91762 Palaiseau, France; 2Groupe de Physique Appliquée, Université de Genève, Ch. de Pinchat 22, 1211 Geneva 4, Switzerland; 3TRUMPF Scientific Lasers GmbH + Co. KG, Feringastr. 10a, 85774 Unterföhring, Germany; 4André Mysyrowicz Consultants, 6 Rue Gabriel, 78000 Versailles, France

In the framework of the Laser Lightning Rod project, we study over 140 m the filaments created by a laser system with J-range pulses of 1 ps duration at 1 kHz repetition rate. We investigate the spatial evolution of the multiple filamentation regime and its ability to control high-voltage discharges at different distance. The measurements were made using both a collimated beam and a focused beam.



10:00 - 10:15
ID: 410 / TOM13 S01: 7
TOM 13 Ultrafast Optical Technologies and Applications

On-demand ultrafast soliton molecules through genetic algorithm optimization

Jérémie Girardot, Aurélien Coillet, Franck Billard, Malik Nafa, Edouard Hertz, Philippe Grelu

Laboratoire ICB, France

Our work contributes to integrate artificial intelligence into laser devices to make them versatile, adaptable and programmable. Within a fiber laser cavity, we incorporate interfaced liquid-crystal components driven by an evolution algorithm that optimizes merit functions leading to user-defined mode-locked regimes. To illustrate the possibility to generate on-demand complex ultrashort-pulse dynamics, we demonstrate the generation of 2-soliton molecules with pre-determined temporal separation.

 
11:00 - 13:00TOM13 S02: Ultrafast: Frequency combs
Location: Aula 1
Session Chair: Thomas Südmeyer, Université de Neuchâtel, Switzerland
 
11:00 - 11:30
Invited
ID: 518 / TOM13 S02: 1
TOM 13 Ultrafast Optical Technologies and Applications

Single-cycle optical frequency combs

Scott Diddams

NIST and University of Colorado, United States of America

Built from robust Er:fiber lasers, we describe optical frequency combs generated with pulses approaching a single-cycle of light. When combined with chi-2 and chi-3 nonlinear optics such short pulses efficiently generate multi-octave frequency combs spanning from 350 nm to beyond 25 microns. We further demonstrate straightforward techniques for scaling the energy of the few-cycle pulses, which can then drive non-perturbative nonlinear optics in solids for harmonic generation below 200 nm. Applications of frequency comb spectroscopy across the full coherent spectrum, from the UV to the MIR, are being pursued.



11:30 - 11:45
ID: 224 / TOM13 S02: 2
TOM 13 Ultrafast Optical Technologies and Applications

Simple approach to increase the ambiguity-free measurement range of dual-comb ranging using a single-cavity laser source

Jakob Fellinger1, Georg Winkler1, Aline S Mayer1, Valentina Shumakova1,2, Lukas W. Perner1, P. E. Collin Aldia1, Vito F Pecile1, Tadeusz Martynkien3, Pawel Mergo4, Grzegorz Soboń5, Oliver H. Heckl1

1University of Vienna, Faculty of Physics, Faculty Center for Nano Structure Research, Christian Doppler Laboratory for Mid-IR Spectroscopy and Semiconductor Optics, Boltzmanngasse 5, 1090 Vienna, Austria; 2Photonics Institute, TU Wien, Gusshaussstrasse 27-387, 1040 Vienna, Austria; 3Faculty of Fundamental Problems of Technology, Wrocław University of Science and Technology, 50-370 Wroclaw, Poland; 4Laboratory of Optical Fiber Technology, M. Curie-Skłodowska University, 20-031 Lublin, Poland; 5Laser & Fiber Electronics Group, Wroclaw University of Technology, 50-370 Wroclaw, Poland

Dual-comb ranging offers high precision and high accuracy distance measurements. However, the application of dual-comb ranging systems is restricted by the complexity of the setup and inherent length ambiguity. Here we present a new and simple approach to increase the ambiguity-free measurement range of dual-comb raining while simultaneously decreasing the complexity by using a single cavity dual-color-fiber laser. By exploiting the intrinsic intensity modulation of our laser we are able to measure distances up to 150 km without ambiguity in a single measurement.



11:45 - 12:00
ID: 332 / TOM13 S02: 3
TOM 13 Ultrafast Optical Technologies and Applications

High-resolution spectroscopy driven by a free-running dual-comb thin-disk laser oscillator

Norbert Modsching, Jakub Drs, Pierre Brochard, Julian Fischer, Stéphane Schilt, Valentin J. Wittwer, Thomas Südmeyer

Laboratoire Temps-Fréquence, Institut de Physique, Université de Neuchâtel, Avenue de Bellevaux 51, 2000 Neuchâtel, Switzerland

We present a thin-disk laser oscillator generating two asynchronous pulse trains of 240-fs duration at each 6-8 W average power and 97-MHz repetition rate at 1030-nm central wavelength. We confirm its suitability for high-resolution spectroscopy in free-running operation by detecting the absorption spectrum of acetylene within 1 millisecond.



12:00 - 12:15
ID: 445 / TOM13 S02: 4
TOM 13 Ultrafast Optical Technologies and Applications

Frequency up- and down-conversion of electro-optic frequency combs with flexible GHz repetition rate

Hanyu Ye1, Valerian Freysz2, Ramatou Bello-Doua3, Lilia Pontagnier1, Eric Freysz2, Giorgio Santarelli1, Eric Cormier1,4

1Laboratoire Photonique Numérique et Nanosciences (LP2N); 2Université de Bordeaux; 3ALPhANOV, Institut d’Optique d’Aquitaine; 4Institut Universitaire de France (IUF)

We present frequency up- and down-conversion of an Yb-fiber based ultrafast electro-optic (EO) frequency comb. The repetition rate of the EO comb is continuously tunable across 11-18 GHz and a frequency divider further extends the tunability over multiple octaves down to 1 GHz. Burst-mode operation is also demonstrated, showing the potential for flexible operation in the temporal domain. Furthermore, second- and forth-harmonic generation, as well as an optical parametric oscillator have been realized based on the EO comb, extending the flexible GHz pulses to other spectral regions.



12:15 - 12:30
ID: 270 / TOM13 S02: 5
TOM 13 Ultrafast Optical Technologies and Applications

CEO-frequency dynamics of a 10-GHz straight-cavity laser modelocked via cascaded quadratic nonlinearities

Léonard Matthieu Krüger, Sandro Luca Camenzind, Benjamin Willenberg, Christopher Richard Phillips, Ursula Keller

ETH Zürich, Switzerland

We show that the power-dependent self-frequency shift introduced by cascaded quadratic nonlinearities couples via the intracavity group delay dispersion to the carrier-envelope offset (CEO) frequency, enabling its control over a wide frequency range.



12:30 - 12:45
ID: 336 / TOM13 S02: 6
TOM 13 Ultrafast Optical Technologies and Applications

Spectral shaping of 100-W Yb:fiber laser system with preservation of the low noise performance

Vito Pecile1, Valentina Shumakova1,2, Jakob Fellinger1, Collin Aldia1, Aline Mayer1, Sarper Salman3, Mingqi Fan3, Prannay Balla3, Stephane Schilt4, Christoph Heyl3,5, Ingmar Hartl3, Gil Porat6,7, Oliver Heckl1

1University of Vienna, Faculty of Physics, Faculty Center for Nano Structure Research, Christian Doppler Laboratory for Mid-IR Spectroscopy and Semiconductor Optics, Boltzmanngasse 5, A-1090 Vienna, Austria; 2Photonics Institute, TU Wien, Gusshaussstrasse 27-387, A-1040 Vienna, Austria; 3Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany; 4Laboratoire Temps-Fréquence, Université de Neuchâtel, CH-2000 Neuchâtel, Switzerland; 5GSI Helmholtzzentrum für Schwerionenforschung GmbH Planckstraße 1, 64291 Darmstadt, Germany; 6Department of Electrical and Computer Engineering, University of Alberta, Edmonton, Alberta T6G 1H9, Canada; 7Department of Physics, University of Alberta, Edmonton, Alberta T6G 2E1, Canada

We report on 100-W 132 MHz Yb:fiber amplifier seeded by a low noise all-polarization maintaining (PM) nonlinear amplifying loop mirror (NALM) oscillator, operating in the near zero-dispersion regime. We tune the laser spectrum to match it to different applications while keeping the noise properties and power performance of the system.



12:45 - 13:00
ID: 273 / TOM13 S02: 7
TOM 13 Ultrafast Optical Technologies and Applications

Noise characterization of a 160 MHz Yb:CaF2 dual-comb laser

Sandro Luca Camenzind, Daniel Koenen, Benjamin Willenberg, Justinas Pupeikis, Christopher Richard Phillips, Ursula Keller

ETH Zurich, Switzerland

We report a novel multiheterodyne relative timing jitter detection measurement and apply it to a single-cavity single-mode-diode pumped dual-comb laser. The inherent passive mutual coherence of the two frequency combs leads to a low relative timing jitter of 7.5 fs [100 Hz, 100 kHz].

 
14:00 - 15:45TOM13 S03: Ultrafast: Ultrafast OPAs and OPOs
Location: Aula 1
Session Chair: Piotr Maslowski, Nicolaus Copernicus University, Poland
 
14:00 - 14:30
Invited
ID: 373 / TOM13 S03: 1
TOM 13 Ultrafast Optical Technologies and Applications

Sub-cycle waveform synthesis with optical parametric amplifiers

Giulio Maria Rossi1,2, Roland E. Mainz1,2, Yudong Yang1,2, Fabian Scheiba1,2, Miguel A. Silva-Toledo1,2, Giovanni Cirmi1,2, Franz X. Kärtner1,2

1Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany; 2Physics Department and The Hamburg Centre for Ultrafast Imaging, University of Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany

We recently demonstrated the coherent synthesis of different phase-stable pulses generated via optical parametric amplifiers (OPAs) with mJ-level energy. The multi-octave spanning bandwidth covered by OPAs, jointly with an advanced phase-control scheme, allow for the synthesis of tailored non-sinusoidal optical waveforms whose duration shrinks below a single optical cycle. Adapting the so-called parametric waveform synthesis (PWS) technology to different pump lasers will allow to further scale energy and average power, making PWS the ideal tool for controlling strong-field light-matter interactions.



14:30 - 14:45
ID: 232 / TOM13 S03: 2
TOM 13 Ultrafast Optical Technologies and Applications

53-W ultrafast non-collinear near-degenerate optical parametric oscillator

Lukas Lang, Carolin P. Bauer, Christopher R. Phillips, Ursula Keller

ETH Zürich, Switzerland

We present a non-collinear linear-cavity optical parametric oscillator delivering 53 W around 1030 nm with a 10.2-MHz repetition-rate and sub-picosecond pulses. The system is pumped by a frequency doubled high-power SESAM-modelocked thin-disk laser.



14:45 - 15:00
ID: 359 / TOM13 S03: 3
TOM 13 Ultrafast Optical Technologies and Applications

Two ultra-broadband OPOs in the visible spectral range

Robin Mevert1,2, Yuliya Binhammer1,2, Christian M Dietrich1,2, Luise Beichert1,2, Jintao Fan1,2, Thomas Binhammer3, Uwe Morgner1,2

1Leibniz University of Hannover, Institute of Quantum Optics, Welfengarten 1, D-30167 Hannover, Germany; 2Cluster of Excellence PhoenixD, Welfengarten 1, D-30167 Hannover, Germany; 3neoLASE GmbH, Hollerithallee 17, D-30419 Hannover, Germany

Two optical parametric oscillator systems are introduced that offer ultra-broadband tunability across the visible spectral range with femtosecond pulse durations and substantial output power. Both are based on BBO in the non-collinear phase matching geometry (NOPO). The first one is pumped in the deep blue and emits directly in the visible, the second one is pumped in the green, emits in the NIR and is converted to the visible via an intracavity sum-frequency process.



15:00 - 15:15
ID: 401 / TOM13 S03: 4
TOM 13 Ultrafast Optical Technologies and Applications

CEP-stable infrared OPCPA sources

Nicolas Thiré, Raman Maksimenka, Yoann Pertot, José Villanueva, Thomas Pinoteau, Nicolas Forget

FASTLITE, France

We review several optical parametric chirped-pulse (OPCPA) systems designed to achieve extreme carrier-envelope phase (CEP) stability and/or spectral tunability in the infrared. The common architecture of these OPCPAs combines a “self-seeded” difference-frequency stage with active CEP stabilization. We demonstrate the compatibility of this architecture with a set of high-power Ytterbium pump lasers based on different amplification technologies (bulk, rod-type, thin-disk, InnoSlab).



15:15 - 15:45
Invited
ID: 327 / TOM13 S03: 5
TOM 13 Ultrafast Optical Technologies and Applications

How to generate continuously tunable ultrafast optical pulses from 4–12 µm, and applications for this versatile new light source in spectroscopy and sensing

Derryck T Reid1, Luke Maidment3, Oguzhan Kara6, Carl Farrell2, Marius Rutkauskas1, Kerr Johnson2, Jake Charsley1, Pablo Castro1, Yiwen Shi4, Peter G Schunemann5

1Heriot-Watt University, United Kingdom; 2Chromacity Ltd, Edinburgh, United Kingdom; 3ICFO – Institut de Ciencies Fotoniques, Barcelona, Spain; 4University of Electronic Science and Technology of China, Chengdu, China; 5BAE Systems, Nashua, USA; 6ETH Zürich

Amongst the new engineerable semiconductor nonlinear gain materials, orientation-patterned gallium phosphide (OPGaP) is unique in allowing a 1-um laser to pump an OPO that can produce light across the near- and mid-IR regions. Using OPGaP-on-GaP we have demonstrated the generation of ultrafast optical pulses from 4–13 µm, with applications in the spectroscopy of gases, aerosols and powders. Most recently, new OPGaP-on-GaAs technology has allowed us, using fan-out and multi-grating crystals, to achieve gap-free continuous tuning from 4–12 µm.

 
16:00 - 17:45TOM13 S04: Ultrafast: High harmonic generation and XUV science 1
Location: Aula 1
Session Chair: Christoph M. Heyl, DESY & Helmholtz-Institute Jena, Germany
 
16:00 - 16:30
Invited
ID: 170 / TOM13 S04: 1
TOM 13 Ultrafast Optical Technologies and Applications

The PST beamline: a laboratory-scale setup for extreme ultraviolet ptychography in the silicon transparency window

Lars Loetgering1,2,3, Wilhelm Eschen1,2, Vittoria Schuster1,2, Robert Klas1,2, Michael Steinert1, Thomas Pertsch1,4, Jens Limpert1,2,4, Jan Rothhardt1,2,4

1Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität Jena, Albert-Einstein-Str. 6, 07745 Jena, Germany; 2Helmholtz-Institute Jena, Fröbelstieg 3, 07743 Jena, Germany; 3Leibniz Institute of Photonic Technology, Albert-Einstein-Str. 9, 07745, Jena, Germany; 4Fraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Str. 7, 07745 Jena, Germany

Extreme ultraviolet microscopy and wavefront sensing are key challenges in the development of next-generation ultrafast applications. Ptychography offers a single solution to both of the aforementioned challenges. Originally proposed and developed in the electron and synchrotron communities, the increase in flux and stability of high harmonic sources has enabled the transfer of ptychography to the laboratory. Here, we present the status of the PST beamline, a versatile tool for laboratory-scale XUV ptychography in the silicon transparency window, including the latest experimental results demonstrating sub-30nm lateral resolution at 13.5 nm wavelength.



16:30 - 16:45
ID: 294 / TOM13 S04: 2
TOM 13 Ultrafast Optical Technologies and Applications

Microwatt-class intra-oscillator high harmonic generation in argon, krypton, and xenon

Julian Fischer, Jakub Drs, Francois Labaye, Norbert Modsching, Valentin J. Wittwer, Thomas Südmeyer

Time and Frequency Laboratory (LTF), Switzerland

We present an intra-oscillator high harmonic generation source based on a 100-fs Kerr lens mode-locked Yb:YAG thin-disk laser. We generate XUV light with an average power of 10 µW at 30 eV in argon, 12 µW at 25 eV in krypton, and 30 µW at 20 eV in xenon.



16:45 - 17:00
ID: 285 / TOM13 S04: 3
TOM 13 Ultrafast Optical Technologies and Applications

Continuously tunable high photon flux high harmonic source at 50 – 70 eV

Alexander Kirsche1,2, Robert Klas1,2, Martin Gebhardt1,2, Lucas Eisenbach1, Wilhelm Eschen1, Joachim Buldt1, Henning Stark1, Jan Rothhardt1,2,3, Jens Limpert1,2,3

1Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-University Jena, Albert-Einstein-Str. 15, 07745 Jena, Germany; 2Helmholtz-Institute Jena, Fröbelstieg 3, 07743 Jena, Germany; 3Fraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Str. 7, 07745 Jena, Germany

In this contribution a fully tunable high harmonic source is presented, which delivers a photon flux of over 1x10^11 photons/s per harmonic line in the range of 50 eV to 70 eV. This table-top waveguide-based XUV source is driven by a 50 W, 1.0 mJ, 36 fs nonlinearly post-compressed fiber laser centered at 1030 nm with a repetition rate of 50 kHz. The tunability of the XUV spectrum is achieved by exploiting the intensity-dependent blueshift of the driving laser field in a noble gas within the waveguide.



17:00 - 17:15
ID: 427 / TOM13 S04: 4
TOM 13 Ultrafast Optical Technologies and Applications

Sub-light-cycle control of relativistic plasma-mirrors

Marie Ouillé1,2, Jaismeen Kaur1,2, Stefan Haessler1, Zhao Cheng1, Aline Vernier1, Jérôme Faure1, Rodrigo Lopez-Martens1

1Laboratoire d'Optique Appliquée, France; 2Ardop Engineering

We report on carrier-enveloppe phase (CEP) effects on the emission of high-order harmonics and electron beams from plasma mirrors driven by relativistic-intensity near-single-cycle laser pulses at 1 kHz repetition rate.



17:15 - 17:45
Invited
ID: 441 / TOM13 S04: 5
TOM 13 Ultrafast Optical Technologies and Applications

Laser wakefield accelerators as a broadband radiation source

Amina Hussein

University of Alberta, Canada

A Laser Wakefield Accelerator (LWFA) can accelerate electrons up to many GeV energies using the accelerating field structure in the wake of a high-power laser pulse propagating through low-density plasma. Within the accelerating structure, energetic electrons can undergo betatron oscillations, emitting a bright, broadband source of keV X-rays with femtosecond-scale duration. A LWFA can also drive wavelength-tunable pulses of infrared radiation with high focusability through spectral broadening of the laser pulse within plasma waves. In this talk, I will discuss the generation and application of these diverse radiation sources.

 
Date: Tuesday, 14/Sept/2021
8:30 - 10:00Opening: Opening of the Conference and Plenary talk by Manuel Guizar-Sicairos
Location: Aula 1
 
8:30 - 9:15
ID: 554 / Opening: 1
Plenary talks

Harnessing coherence and computational imaging for nanoscale structure characterization using X-rays

Manuel Guizar-Sicairos

Paul Scherrer Institut, Switzerland

Access to local information about material composition and its distribution at the nanoscale is of chief importance for studying functional materials both for biology and materials science, as well as for the fundamental understanding of physical properties. X-ray imaging with high-energy photons, otherwise known as hard X-rays, offers an opportunity for deriving such information in a minimally intrusive procedure. This is due to the high penetration depth of hard X-rays, which allows probing intact representative volumes, and combined with their sub-nm wavelength opens the door to nm-scale imaging. One of the challenges for nm-resolution imaging at these energies lies in the fabrication of lenses of sufficient quality. If the X-ray source is coherent, then imaging lenses can be forgone altogether and instead computational reconstructions can be used, for example via holography or iterative phase retrieval algorithms. In this talk, I will provide an introduction to some of the coherent lensless imaging techniques used in X-ray microscopy for nanoscale imaging: X-ray holography, coherent diffractive imaging, and ptychography. Furthermore, I will show examples from the state of the art methods and how they are used today for nanoscale 3D imaging, imaging of fast dynamics, and chemical characterization of functional materials. I will also introduce the principle, and practical examples, of surveying nanostructure properties on macroscopic-scale samples using scanning small angle X-ray scattering (SAXS). In our group, we have generalized this technique using tensor tomography in order to probe statistical anisotropy of nanostructure in samples on the order of millimeters in linear size.

 
10:15 - 11:45TOM13 S05: Ultrafast: Ultrafast MIR systems
Location: Aula 1
Session Chair: Oliver H. Heckl, University of Vienna, Austria
 
10:15 - 10:30
ID: 295 / TOM13 S05: 1
TOM 13 Ultrafast Optical Technologies and Applications

Efficient carrier-envelope phase tunable mid-infrared frequency combs based on CW-seeded optical parametric generation

Mikhail Roiz1, Jui-Yu Lai2, Juho Karhu3, Markku Vainio1,4

1Department of Chemistry, University of Helsinki, FI-00560, Helsinki, Finland; 2HC Photonics Corp. Hsinchu Science Park, Hsinchu 30078, Taiwan; 3Metrology Research Institute, Aalto University, Espoo, FI-00076, Finland; 4Photonics Laboratory, Physics Unit, Tampere University, Tampere, FI-33101, Finland

We present an efficient method for generating frequency combs in the mid-infrared (MIR) spectral range in bulk lithium niobate crystals as well as in waveguides. Our approach is simple and robust, since it is based on single-pass configuration of femtosecond Optical Parametric Generation (OPG) seeded by a telecom continuous-wave laser. Precise and fast tuning of the seed laser allows to rapidly change the offset frequency of the generated MIR comb independent of its repetition rate. The MIR comb’s offset frequency is inherently known, so its direct detection is not required.



10:30 - 10:45
ID: 238 / TOM13 S05: 2
TOM 13 Ultrafast Optical Technologies and Applications

Mid-IR OPCPA operating in the atmospheric transparency window around 8.6 µm

Ignas Astrauskas1, Claudia Gollner1, Tobias Flöry1, Andrius Baltuška1,2, Audrius Pugžlys1,2

1Photonics Institute, TU Wien, Gusshausstrasse 27-387, A-1040 Vienna, Austria; 2Center for Physical Sciences and Technology, Savanoriu Ave. 231, LT-02300, Vilnius, Lithuania

Generation of a pair of sub-mJ femtosecond pulses with arbitrary delay control in a single cw-pumped Yb regenerative amplifier is demonstrated. The two pulses drive separate optical parametric amplifiers producing seed for Ho:YAG chirped pulse amplifier and mid-IR optical parametric chirped pulse amplifier. As a result, broadband 40 µJ pulses are generated around 8.6 µm wavelength, which lies in the atmospheric transparency window.



10:45 - 11:15
Invited
ID: 454 / TOM13 S05: 3
TOM 13 Ultrafast Optical Technologies and Applications

Frequency divide-and-conquer approach to producing ultra-broadband mid-IR frequency combs and single-cycle pulses

Konstantin Vodopyanov

Univ. Cent. Florida, United States of America

A subharmonic (frequency-divide-by-2) optical parametric oscillator (OPO) is reported as an efficient frequency divider that rigorously both down converts and dramatically augments the spectrum of the pump laser, while maintaining its coherence. Our recent result is a demonstration of a subharmonic system with an unprecedented continuous wavelength span of 3–12 µm that covers most of the molecular ro-vibrational “signature” region. The OPO with a minimally dispersive cavity was pumped by a 2.35-µm Kerr-lens mode-locked oscillator and delivered 245 mW of the average power with the conversion efficiency exceeding 20%.



11:15 - 11:30
ID: 400 / TOM13 S05: 4
TOM 13 Ultrafast Optical Technologies and Applications

A µJ-level parametric source tunable from 3 to 10 µm by direct difference-frequency generation in LGS at 250 kHz

Vincent Femy, Maxim Neradovskiy, Thomas Pinoteau, José Villanueva, Olivier Albert, Nicolas Forget

FASTLITE, France

We demonstrate the direct generation, at a repetition of 250 kHz, of µJ-level, sub-160 fs pulses from 3 to 10 µm in a LiGaS2 (LGS) crystal pumped at 1030 nm.



11:30 - 11:45
ID: 283 / TOM13 S05: 5
TOM 13 Ultrafast Optical Technologies and Applications

Mid-infrared parametric wavelength conversion seeded with fiber optical parametric sources

Ronan A. Battle1, Anita M. Chandran1, Timothy H. Runcorn1, Arnaud Mussot2, Alexandre Kudlinski2, Robert T. Murray1, J. Roy Taylor1

1Femtosecond Optics Group, Department of Physics, Imperial College London, Prince Consort Road, London SW7 2BW, UK; 2Université de Lille, CNRS, UMR 8523-PhLAM—Physique des Lasers Atomes et Molécules, F-59000 Lille, France

A new method of seeding χ2 optical parametric converters with χ3 fiber optical parametric sources is introduced. We demonstrate a tuneable mid-infrared (MIR) source around 3 µm with the technique and discuss the potential of this architecture.

 
13:15 - 14:00Plenary speech: Nikolay I. Zheludev
Location: Aula 1

Nikolay I. Zheludev

Deputy Director (Physics) of the Optoelectronics Research Centre
University of Southampton, UK and Nanyang Technological University, Singapore

 

Nikolay Zheludev is President’s Professor of Physics and co-Director of the Photonics Institute at Nanyang Technological University Singapore and  Professor of Physics and Deputy Director of the Optoelectronics Research Centre at the University of Southampton, UK. He is known for his fundamental studies of metamaterials, nanophotonics, toroidal electrodynamic and optical superoscillations. He is Fellow of the Royal Society (UK Academy of Sciences) and a Member of the US National Academy of Engineering.  His awards include the Thomas Youngs Medal and the President's Science Award, Singapore.

Title: Molecular level metrology and imaging with topological light and free electrons

We demonstrate dimensional metrology and odometry (detection of change in position over time) with resolution on nanometric to picometric scales by analysing scattering of electrons or topologically structured light from the nanostructures using artificial intelligence. We show how these techniques can be applied to characterization and optimization of nano-opto-mechanical metamaterials and to fundamental studies of the dynamics of thermal motion and the physics of phonons in photonic nanostructures.

 
ID: 116
Plenary talks

Molecular level metrology and imaging with topological light and free electrons

Nikolay Zheludev

University of Southampton and NTU Singapore

We demonstrate dimensional metrology and odometry (detection of change in position over time) with resolution on nanometric to picometric scales by analysing scattering of electrons or topologically structured light from the nanostructures using artificial intelligence. We show how these techniques can be applied to characterization and optimization of nano-opto-mechanical metamaterials and to fundamental studies of the dynamics of thermal motion and the physics of phonons in photonic nanostructures.

 
14:15 - 15:45TOM13 S06: Ultrafast: MIR spectroscopy
Location: Aula 1
Session Chair: Lucile Rutkowski, Institute of Physics of Rennes, France
 
14:15 - 14:45
Invited
ID: 221 / TOM13 S06: 1
TOM 13 Ultrafast Optical Technologies and Applications

Precision electric-field-resolved infrared spectroscopy

Ioachim Pupeza

MPI für Quantenoptik, Germany

The talk addresses recent progress in mid-infrared field-resolved spectroscopy driven by high-power MHz-repetition-rate femtosecond lasers. Intrapulse difference-frequency generation (IPDFG) delivers trains of Watt-level few-cycle mid-infrared optical waveforms with sub-attosecond jitter. Electro-optic sampling (EOS) with multi-Watt short-wave mid-infrared gate pulses allows for recording these waveforms with high fidelity, and with sensitivities close to the fundamental quantum limit. This renders the combination of IPDFG and EOS ideal for tracing light-matter interactions on their native time scales, as well as for broadband vibrational fingerprinting of molecular samples with unprecedented sensitivity and dynamic range.



14:45 - 15:00
ID: 383 / TOM13 S06: 2
TOM 13 Ultrafast Optical Technologies and Applications

Cavity-enhanced sub-Doppler optical-optical double-resonance spectroscopy of methane using a frequency comb

Vinicius Silva de Oliveira1, Isak Silander1, Lucile Rutkowski2, Grzegorz Sobon3, Ove Axner1, Kevin K. Lehmann4, Aleksandra Foltynowicz1

1Department of Physics, Umea University, Umea, Sweden; 2Univ Rennes, CNRS, IPR (Institut de Physique de Rennes), Rennes, France; 3Laser & Fiber Electronics Group, Faculty of Electronics, Wrocław University of Science and Technology, Wrocław, Poland; 4Departments of Chemistry & Physics, University of Virginia, Charlottesville, USA

We report the measurement and assignment of sub-Doppler transitions in the 3ν3 ← ν3 band of methane using optical-optical double resonance spectroscopy with a 3.3 µm continuous wave pump and a 1.67 µm frequency comb probe. We implement an optical cavity for the comb probe that improves the sensitivity by more than two orders of magnitude compared to previous measurements in a single-pass cell.



15:00 - 15:15
ID: 469 / TOM13 S06: 3
TOM 13 Ultrafast Optical Technologies and Applications

Electro-optic Dual-Comb Spectrometer for Applications in the Mid-Infrared

Alexandre Parriaux, Kamal Hammani, Guy Millot

Laboratoire Interdisciplinaire Carnot de Bourgogne (ICB), UMR6303 CNRS, Université Bourgogne Franche-Comté, Dijon, France

We present a dual-comb setup operating in the mid-infrared between 4.2µm and 4.85µm based on the frequency conversion of combs generated around 1.56µm by intensity modulation. We show that the spectrometer can be used for high-resolution spectroscopic applications enabling isotopic ratio measurements, but also towards the medical domain.



15:15 - 15:45
Invited
ID: 245 / TOM13 S06: 4
TOM 13 Ultrafast Optical Technologies and Applications

High-resolution optical frequency comb Fourier transform spectroscopy in the near- and mid-infrared wavelength range

Aleksandra Foltynowicz

Department of Physics, Umea University, Sweden

We use Fourier transform spectroscopy based on frequency combs to measure broadband spectra with resolution limited by the comb mode width. In the near-infrared, we measured mode profiles of a high-finesse cavity over 15 THz of bandwidth with 3 kHz resolution, and derived absorption and dispersion spectra of three CO2 bands from the broadening and shift of the cavity modes. In the mid-infrared, we measured and assigned absorption spectra of CH3I around 3.3 µm, and we retrieved transition frequencies of N2O and CH4 around 7.8 µm with precision <200 kHz.

 
16:15 - 17:45TOM13 S07: Ultrafast: Ultrafast oscillators
Location: Aula 1
Session Chair: Catherine Yuriko Teisset, TRUMPF Scientific Lasers, Germany
 
16:15 - 16:30
ID: 292 / TOM13 S07: 1
TOM 13 Ultrafast Optical Technologies and Applications

100-W, 100-MW, 50-fs thin-disk laser oscillator based on Yb:YAG

Jakub Drs, Julian Fischer, Norbert Modsching, François Labaye, Valentin J. Wittwer, Thomas Südmeyer

University of Neuchâtel, Switzerland

We demonstrate an Yb:YAG thin-disk laser oscillator operating in the self-phase modulation broadened regime. The laser delivers 100 W of average power in 50-fs pulses at 17-MHz repetition rate with an optical-to-optical efficiency of 25%.



16:30 - 16:45
ID: 421 / TOM13 S07: 2
TOM 13 Ultrafast Optical Technologies and Applications

Towards 2-µm high-power ultrafast thin-disk lasers

Yicheng Wang1, Sergei Tomilov1, Martin Hoffmann1, Jonas Heidrich2, Behçet Özgür Alaydin2, Matthias Golling2, Ursula Keller2, Clara J. Saraceno1

1Photonics and Ultrafast Laser Science, Ruhr Universität Bochum, Universitätsstraße 150, 44801 Bochum, Germany; 2Department of Physics, Institute for Quantum Electronics, ETH Zürich, Auguste-Piccard-Hof 1, 8093 Zürich, Switzerland

High power ultrafast laser systems directly emitting in the short-wavelength infrared region (1.4-3 µm) has seen strong interest, due to applications in science and technology. Among different laser technologies, the development of 2-µm thin-disk lasers is very promising for power and energy scaling. Recently, we have demonstrated record results with Ho:YAG thin-disk oscillator, delivering 112-W CW power, and 40.5-W modelocked operation with 1.66-ps pulse duration at 52.2-MHz. Here we would like to briefly review the recent achievements of 2-µm thin-disk lasers and discuss the potential development and applications.



16:45 - 17:00
ID: 374 / TOM13 S07: 3
TOM 13 Ultrafast Optical Technologies and Applications

Few-cycle pulses from efficient Yb-doped solid-state lasers

Francois Labaye1, Valentin J. Wittwer1, Marin Hamrouni1, Norbert Modsching1, Eric Cormier2,3, Thomas Südmeyer1

1Laboratoire Temps-Fréquence, Institut de Physique, Université de Neuchâtel; 2Laboratoire Photonique, Numérique et Nanosciences, CNRS-IOGS-Université Bordeaux; 3Institut Universitaire de France (IUF)

We present a novel pumping scheme relying on cross-polarization that overcomes previous bandwidth and efficiency limitations. Implementing this pumping scheme in a soft-aperture Kerr-lens mode-locked laser oscillator based on Yb:CALGO, we demonstrate more than one order of magnitude higher optical-to-optical efficiency compared to previous few-cycle laser oscillators based on Yb-doped gain materials operating in the sub-30-fs pulse duration regime.



17:00 - 17:15
ID: 234 / TOM13 S07: 4
TOM 13 Ultrafast Optical Technologies and Applications

Femtosecond middle IR lasers and frequency combs based on polycrystalline Cr:ZnS

Sergey Vasilyev1, Viktor Smolski1, Jeremy Peppers1, Igor Moskalev1, Mike Mirov1, Yury Barnakov1, Sergey Mirov1,3, Valentin Gapontsev2

1IPG Photonics, Southeast Technology Center, AL, USA; 2IPG Photonics Corporation, MA, USA; 3University of Alabama at Birmingham, AL, USA

We report an approach to generation of femtosecond pulses and optical frequency combs in the 2 – 20 µm spectral range. The laser architecture is based on a combination of laser and nonlinear interactions in polycrystalline Cr:ZnS media that enables simultaneous amplification of ultrashort pulses, nonlinear pulse compression to 2-optical-cycle, and nonlinear broadening of pulses’ spectrum to an optical octave. This has allowed us to implement robust and reliable shoe-box sized middle-IR frequency combs with ultra-low timing jitter of the pulse trains, broad instantaneous spectra, and Watt-level average power.



17:15 - 17:30
ID: 266 / TOM13 S07: 5
TOM 13 Ultrafast Optical Technologies and Applications

2.4-µm SESAM modelocked high-power repetition rate scalable femtosecond Cr:ZnS oscillator

Ajanta Barh, B. Ozgur Alaydin, Jonas Heidrich, Marco Gaulke, Matthias Golling, Christopher R. Phillips, Ursula Keller

ETH Zürich, Switzerland

We present InGaSb/GaSb quantum well based high-quality SESAM at infrared wavelength of 2.4 µm. Using the SESAM we demonstrate self-starting soliton modelocking of Cr:ZnS oscillators delivering 155-fs pulses at record-high 2 GHz repetition rate and short pulses of only 79-fs at 250 MHz repetition rate, both at a high average output power of 0.8 W.



17:30 - 17:45
ID: 260 / TOM13 S07: 6
TOM 13 Ultrafast Optical Technologies and Applications

Development and optical characterization of 2.1-μm SESAMs optimized for high-power operation in Ho-doped lasers

Jonas Heidrich, Marco Gaulke, B. Ozgur Alaydin, Matthias Golling, Ajanta Barh, Ursula Keller

ETH Zürich, Switzerland

We present a high-precision (<0.03%) nonlinear reflectivity and pump-probe characterization of InGaSb/GaSb quantum-well-based SESAMs for high-power 2.1 μm Ho-doped lasers. The SESAMs have ~1% modulation depth, high saturation fluences and fast recovery times.

 
18:00 - 19:30TOM13 S08: Ultrafast: Ultrafast fiber laser systems
Location: Aula 1
Session Chair: Jakob Fellinger, University of Vienna, Faculty of Physics, Austria
 
18:00 - 18:30
Invited
ID: 209 / TOM13 S08: 1
TOM 13 Ultrafast Optical Technologies and Applications

Spatiotemporal mode-locking in fiber lasers

Frank William Wise

Cornell University, United States of America

Until 2017, all mode-locked lasers essentially operated in a single transverse mode of the laser cavity. In the past few years, the first demonstrations of locking of multiple transverse and longitudinal modes of a fiber laser have appeared. The existence of many different 3-dimensional (spatiotemporal) lasing states opens opportunities for future scientific investigation. Generation of ultrashort pulses in multiple modes may also provide a new route to power scaling in fiber lasers. Basic features of multimode or spatiotemporal mode-locking will be presented along with first steps toward a theoretical treatment.



18:30 - 18:45
ID: 263 / TOM13 S08: 2
TOM 13 Ultrafast Optical Technologies and Applications

130 W, 1.3 mJ coherently combined ultrafast Tm-doped fiber laser system operating at 1.9 µm wavelength

Tobias Heuermann1,2, Ziyao Wang1, Mathias Lenski1, Martin Gebhardt1,2, Christian Gaida3, Arno Klenke2, Michael Müller1, Christian Grebing1,4, Jens Limpert1,2,4

1Friedrich-Schiller-University Jena, Germany; 2Helmholtz-Institute Jena, Jena, Germany; 3Active Fiber Systems GmbH, Jena, Germany; 4Fraunhofer Institute for Optics and Fine Mechanics, Jena, Germany

In this contribution, we present our first results on coherent beam combination of four ultrafast Tm-doped fiber amplifiers. Pulse energies in the mJ-regime with a pulse duration of 123 fs and an average power of 130 W (98 kHz repetition rate) were achieved. This is the highest pulse energy emitted from an ultrafast SWIR fiber laser to date and proves the scaling potential of ultrafast Tm-doped fiber lasers.



18:45 - 19:00
ID: 357 / TOM13 S08: 3
TOM 13 Ultrafast Optical Technologies and Applications

Amplitude noise optimization in mode-locked Yb:doped all polarization-maintaining nonlinear amplifying loop mirror lasers

Vito Fabian Pecile1, Aline Sophie Mayer1, Jakob Fellinger1, Valentina Shumakova1,2, Oliver Hubert Heckl1

1University of Vienna, Faculty of Physics, Faculty Center for Nano Structure Research, Christian Doppler Laboratory for Mid-IR Spectroscopy and Semiconductor Optics, Boltzmanngasse 5, 1090 Vienna, Austria; 2Photonics Institute, TU Wien, Gusshausstraße 27-29, 1040 Vienna, Austria

In the past few years, the interest in fiber lasers mode-locked with a non-linear amplifying loop mirror has increased due to their robustness and low noise performance. Different amplitude noise characteristics for operation in different intracavity group delay dispersion regimes have been investigated. However, in recently reported laser designs, tuning of the saturable absorber parameters is possible even after achieving mode-locking. We provide systematic amplitude noise measurements and present options for a further optimization of the amplitude noise performance by altering the saturable absorber behavior in mode-locked operation.



19:00 - 19:30
Invited
ID: 507 / TOM13 S08: 4
TOM 13 Ultrafast Optical Technologies and Applications

Fiber-based laser systems emitting in a broad range of the mid-infrared

Jaroslaw Sotor

Wroclaw University of Science and Technology, Poland

The molecular fingerprint region located in the 2-10 um spectral range plays an essential role in scientific research, environmental protection, security, and even searching for signs of life beyond the Earth. Progress in these fields is directly linked to developing stable and versatile laser sources operating in the MIR. This talk will present our recent results on quasi-all-fiber laser systems generating broadband optical spectra with a high-quality frequency comb structure in the MIR spectral range. As a workhorse, a stable and compact femtosecond Er-doped fiber-based platform is used.

 
Date: Wednesday, 15/Sept/2021
8:15 - 9:45TOM13 S09: Ultrafast: Ultrafast high power amplifiers
Location: Aula 1
Session Chair: Hanieh Fattahi, Max Planck Institute for the Science of Light, Germany
 
8:15 - 8:45
Invited
ID: 183 / TOM13 S09: 1
TOM 13 Ultrafast Optical Technologies and Applications

Ultrafast thin-disk amplifier with over 500 mJ pulse energy at 1 kHz repetition rate

Yanik Pfaff, Michael Rampp, Clemens Herkommer, Robert Jung, Catherine Yuriko Teisset, Sandro Klingebiel, Thomas Metzger

TRUMPF Scientific Lasers, Germany

We demonstrate a thin-disk based regenerative amplifier system with a maximum pulse energy before compression of 550 mJ at a repetition rate of 1 kHz. Pulse compression was preliminary done with a fraction of the output and led to a pulse duration of 602 fs.



8:45 - 9:00
ID: 419 / TOM13 S09: 2
TOM 13 Ultrafast Optical Technologies and Applications

Thin-disk multipass amplifier for multi-kilowatt ultrafast lasers

Johanna Dominik1, Michael Scharun1, Benjamin Dannecker1, Michael Rampp2, Simon Nagel1, Thomas Dekorsy3, Dominik Bauer1, Alexander Killi1

1TRUMPF Laser GmbH, Germany; 2TRUMPF Scientific Lasers GmbH + Co. KG, Germany; 3German Aerospace Center (DLR), Institute of Technical Physics and Stuttgart University, Germany

We present a thin-disk multipass amplifier which allows power scaling of ultrafast lasers to the multi-kilowatt and 100 mJ range. With a seed laser including an Innoslab amplifier, 170 W of average power were amplified to 1950 W average power at a repetition rate of 800 kHz with near diffraction-limited beam quality at a stretched pulse duration of 10 ps. In a second experiment, 117 mJ of pulse energy were reached at a stretched pulse duration of 1 ns using a seed laser including a regenerative thin-disk amplifier.



9:00 - 9:15
ID: 255 / TOM13 S09: 3
TOM 13 Ultrafast Optical Technologies and Applications

Coherently combined high power 16 core rod-type multicore amplifier

Arno Klenke1,2, Albrecht Steinkopff1, Christopher Aleshire1, Cesar Jauregui1, Stefan Kuhn3, Johannes Nold3, Christian Hupel3, Sigrun Hein3, Steffen Schulze3, Nicoletta Haarlammert3, Thomas Schreiber3, Andreas Tünnermann1,2,3, Jens Limpert1,2,3

1Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-Universität, Albert-Einstein-Strasse 15, 07745 Jena, Germany; 2Helmholtz-Institute Jena, Froebelstieg 3, 07743 Jena, Germany; 3Fraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Strasse 7, 07745 Jena, Germany

We present a rod-type, ytterbium-doped multicore fiber with 4x4 cores for coherent beam combination of femtosecond pulses. Due to the all-glass structure of the fiber, high average powers of up to 500 W after combination and compression could be achieved. Additionally, a version of this fiber with larger core diameters has been employed for energy extraction experiments resulting in multi 10 mJ energy nanosecond pulses, demonstrating future power scaling opportunities.



9:15 - 9:45
Invited
ID: 472 / TOM13 S09: 4
TOM 13 Ultrafast Optical Technologies and Applications

KW average power, high pulse energy, ultrafast lasers based on cryo-cooled Yb:YAG

Jorge J. Rocca

Colorado State University, United States of America

We discuss the generation of > 1 J pulses at 1 kHz repetition rate from a cryogenically cooled Yb:YAG active mirror amplifier. After compression 1.1 J pulses of < 4.5 ps duration are obtained with high beam quality and high shot-to-shot stability. In addition, we report the frequency doubling of 1.2 J ns pulses with 78 percent conversion efficiency in LBO to generate 0.94 J, =515 nm pulses. A second LBO crystal generates additional >100 mJ second harmonic from unconverted light reaching a total green average power of 1.04 kW.

 
10:15 - 11:00Plenary speech Isabelle Staude
Location: Aula 1
Session Chair: Riad Haidar, Onera, France
 
ID: 107
Plenary talks

Tunable, light-emitting and nonlinear all-dielectric metasurfaces

Isabelle Staude

Friedrich Schiller University Jena, Germany

Optically resonant dielectric metasurfaces have been established as a versatile platform for manipulating light fields at the nanoscale. While initial research efforts were concentrated on purely passive structures, all-dielectric metasurfaces also hold a huge potential for dynamic control of light fields, as well as for tailoring light emission processes, such as spontaneous emission and nonlinear frequency generation. This talk will review our recent advances in tunable, light-emitting and nonlinear all-dielectric metasurfaces, and outline future research directions for next-generation metasurface architectures.

 
11:15 - 12:45TOM13 S10: Ultrafast: Nonlinear compression 1
Location: Aula 1
Session Chair: Jan Rothhardt, Helmholtz-Institute Jena, Germany
 
11:15 - 11:45
Invited
ID: 202 / TOM13 S10: 1
TOM 13 Ultrafast Optical Technologies and Applications

High-energy multidimensional solitary states in hollow-core fibers

Reza Safaei1, Guangyu Fan1, Ojoon Kwon1, Katherine Légaré1, Bruno E. Schmidt2, Philippe Lassonde1, Heide Ibrahim1, François Legare1

1INRS-EMT, Canada; 2few-cycle Inc., Canada

Using sub-picosecond pulses, we report the first time observation of the formation of highly-stable multidimensional solitary states (MDSS) in molecular-filled hollow-core fibers. The MDSS have broadband red-shifted spectra with an uncommon negative quadratic spectral phase at output, originating from strong intermodal interactions. This approach paves the route to compress sub-picosecond Ytterbium laser systems to few-cycle pulse duration using a compact setup.



11:45 - 12:00
ID: 435 / TOM13 S10: 2
TOM 13 Ultrafast Optical Technologies and Applications

Single-stage few-cycle nonlinear compression of Ti:Sa femtosecond pulses in a multipass cell

Louis Daniault1, Zhao Cheng1, Jean-François Hergott2, Fabrice Réau2, Olivier Tcherbakoff2, Nour Daher3, Xavier Delen3, Marc Hanna3, Rodrigo Lopez-Martens1

1Laboratoire d’Optique Appliquée, CNRS, Ecole Polytechnique, ENSTA Paris, Institut Polytechnique de Paris; 2Université Paris-Saclay, CEA, CNRS, LIDYL; 3Université Paris-Saclay, Institut d'Optique Graduate School, CNRS, Laboratoire Charles Fabry

We report on the nonlinear temporal compression of mJ energy pulses from a Ti:Sa chirped pulse amplifier system in a multipass cell filled with argon. The pulses are compressed from 30 fs down to 5.6 fs, corresponding to approximately two optical cycles. The post-compressed beam exhibits excellent spatial quality and homogeneity. These results pave the way to robust and energy-scalable compression of Ti:Sa pulses down to the few-cycle regime.



12:00 - 12:15
ID: 456 / TOM13 S10: 3
TOM 13 Ultrafast Optical Technologies and Applications

Post-compression of 9.2-um terawatt laser pulses to femtoseconds

Igor V. Pogorelsky, Mikhail N. Polyanskiy, Marcus Babzien, Mark A. Palmer

Brookhaven National Laboratory, United States of America

We have experimentally demonstrated the post-compression of a long-wave infrared (9.2 µm) 150-GW peak power pulse from 2 ps to less than 500 fs using a combination of two optical materials with significantly different ratios of the nonlinear refractive index to the GVD coefficient. Such combination allows for optimization of the compression mechanism and promises a viable path to scaling peak powers to supra-terawatt levels.



12:15 - 12:30
ID: 422 / TOM13 S10: 4
TOM 13 Ultrafast Optical Technologies and Applications

Near-single-cycle pulses generated through post-compression on FAB1 laser at ATTOLAB-Orme facility

Jean-Francois Hergott1, Hugo J.B. Marroux1, Rodrigo Lopez-Martens2, Fabrice Réau1, Fabien Lepetit1, Olivier Tcherbakoff1, Thierry Auguste1, Lucie Maeder1, Xiaowei Chen3, Benoit Bussière3, Pierre-Mary Paul3, Pascal D'Oliveira1, Pascal Salières1

1Université Paris-Saclay, CEA, CNRS, LIDYL, 91191, Gif-sur-Yvette, France; 2Laboratoire d’Optique Appliquée, CNRS, Ecole Polytechnique, ENSTA Paris, Institut Polytechnique de Paris, 91120 Palaiseau, France; 3Amplitude 2-4 rue du Bois Chaland CE 2926, 91029 Evry, France

Generating energetic, few-cycle laser pulses with stabilized Carrier-Envelope Phase at high repetition rate constitutes a first step to access the ultra-fast dynamics underlying the interaction of matter with intense, ultrashort pulses in attosecond science or high field physics. We present here a post-compression stage delivering 3.8fs pulses with 2.5mJ coupled to a Ti: Sa based 1 kHz TW-class laser which can deliver 17.8fs pulses with 350mrad shot to shot CEP noise. This is the first step towards high energy few-cycle post-compression of the FAB laser at ATTOLAB-Orme.



12:30 - 12:45
ID: 229 / TOM13 S10: 5
TOM 13 Ultrafast Optical Technologies and Applications

Divided-pulse nonlinear compression in a multipass cell

Henning Stark1, Joachim Buldt1, Michael Müller1, Christian Grebing1,2, Arno Klenke1,3, Jens Limpert1,2,3

1Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, Albert-Einstein-Str. 6, 07745 Jena, Germany; 2Fraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Str. 7, 07745 Jena, Germany; 3Helmholtz-Institute Jena, Fröbelstieg 3, 07743 Jena, Germany

We present the nonlinear pulse compression of an ytterbium-based 4-pulse burst in a gas-filled multipass cell as a scaling approach to increase the supported pulse energy and output peak power. The pulse division and passive recombination is based on birefringent crystals and enables an output pulse energy of 4.5 mJ at a pulse duration of 31 fs while more than doubling the energy limitations set by laser induced damage of the multipass cell mirrors. Overall, a good efficiency and temporal contrast are achieved.

 
15:00 - 15:45Plenary speech: Federico Capasso
Location: Aula 1

Federico Capasso

Professor

John A. Paulson School of Engineering and Applied Sciences
Harvard University, Cambridge, USA

 

Federico Capasso is the Robert Wallace Professor of Applied Physics at Harvard University, which he joined in 2003 after 27 years at Bell Labs where his career advanced from postdoctoral fellow to Vice President for Physical Research. He pioneered bandgap engineering leading to many new heterostructure devices including the invention of the quantum cascade laser. He and his group did research on plasmonic and dielectric metasurfaces including the generalized laws of refraction and reflection, flat optics with focus on high performance metalenses and on new methods to generate structured light. He carried out fundamental studies of the Casimir effect including the first measurement of the repulsive Casimir force. He is a member of the National Academy of Sciences, the National Academy of Engineering and the American Academy of Arts and Sciences . His awards include the 2021 Yves Medal and Jarus Quinn Prize of the Optical Society, the Balzan Prize for Applied Photonics, the King Faisal Prize, the American Physical Society Arthur Schawlow Prize, the IEEE Edison Medal, the Materials Research Society Medal, the Franklin Institute Wetherill Medal and the Enrico Fermi Prize. He holds honorary doctorates from Lund University, Diderot University and the University of Bologna.

 

Title: Meta-optics: From Flat Lenses to Cameras and Structured Light

Subwavelength spaced arrays of nanostructures, known as metasurfaces, provide a new basis for recasting optical components into thin planar elements, easy to optically align and control aberrations, leading to a major reduction in system complexity and footprint as well as theintroduction of new optical functions. The planarity of flat optics will lead to the unification of semiconductor manufacturing and lens making, where the planar technology to manufacture computer chips will be adapted to make CMOS compatible metasurface based optical components for high volume markets like cell phones. New polarization sensitive and depth cameras will be discussed. Metasurfaces also offer fresh opportunities for str ucturing light by wavefront engineering. I will discuss spin to total orbital angular momentum (OAM) converters and high OAM lasing, as well as flat devices that enable light’s spin and OAM to evolve, simultaneously, from one state to another along the propagation direction

 
ID: 553
Plenary talks

Meta-optics: from flat lenses to cameras and structured light

Federico Capasso

Harvard John A. Paulson School of Engineering and Applied Sciences, United States of America

Subwavelength spaced arrays of nanostructures, known as metasurfaces, provide a new basis for

recasting optical components into thin planar elements, easy to optically align and control

aberrations, leading to a major reduction in system complexity and footprint as well as the

introduction of new optical functions. The planarity of flat optics will lead to the unification of

semiconductor manufacturing and lens making, where the planar technology to manufacture

computer chips will be adapted to make CMOS compatible metasurface based optical components

for high volume markets like cell phones. New polarization sensitive and depth cameras will be

discussed. Metasurfaces also offer fresh opportunities for structuring light by wavefront

engineering. I will discuss spin to total orbital angular momentum (OAM) converters and high

OAM lasing, as well as flat devices that enable light’s spin and OAM to evolve, simultaneously,

from one state to another along the propagation direction

 
16:15 - 17:45TOM13 S11: Ultrafast: Ultrafast Dynamics
Location: Aula 1
Session Chair: Paolo Antonio Carpeggiani, TU WIEN, Austria
 
16:15 - 16:30
ID: 178 / TOM13 S11: 1
TOM 13 Ultrafast Optical Technologies and Applications

Attosecond electron motion control in solid-state

Dandan Hui1, Husain Alqattan1, Shunsuke Yamada2,3, Vladimir Pervak4, Kazuhiro Yabana2,3, Mohammed Hassan1

1University of Arizona, United States of America; 2Graduate School of Pure and Applied Sciences, University of Tsukuba, Japan.; 3Center for Computational Sciences, University of Tsukuba, Japan.; 4Ludwig-Maximilians-Universität München, Germany.

Advancements in attosecond pulse generation give access to the electron motion dynamics of matter in real-time. Here, we measured the field-induced electronic delay response of the dielectric system to be in the order of a few hundred attoseconds and increase at higher field strength. Moreover, we demonstrate the attosecond electron motion control using synthesized two-octave light waveforms. This on-demand electron motion control opens the door for establishing ultrafast optical switches and paves the way to extend the frontiers of modern electronics and data information processing technologies into the petahertz realm.



16:30 - 16:45
ID: 457 / TOM13 S11: 2
TOM 13 Ultrafast Optical Technologies and Applications

Time-resolved high harmonic spectroscopy of ultrafast solid-state dynamics in VO2

Mina R. Bionta1,2, Elissa Haddad1, Adrien Leblanc1, Vincent Gruson1,3, Philippe Lassonde1, Heide Ibrahim1, Jérémie Chaillou1, Nicolas Émond1, Martin R. Otto4, Álvaro Jiménez-Galán5, Rui E. F. Silva6, Misha Ivanov5,7,8, Bradley J. Siwick4, Mohamed Chaker1, François Légaré1

1Centre Énergie Matériaux Télécommunications, Institut national de la recherche scientifique, Varennes, Québec, Canada; 2Research Laboratory of Electronics, Massachusetts Institute of Technology, Cambridge, Massachusetts, USA; 3Department of Physics, The Ohio State University, Columbus, Ohio, USA; 4Department of Physics and Department of Chemistry, Center for the Physics of Materials, McGill University, Montréal, Québec, Canada; 5Max-Born-Institute, Berlin, Germany; 6Departamento de Física Teórica de la Materia Condensada, Universidad Autónoma de Madrid, Madrid, Spain; 7Deparment of Physics, Humboldt University, Berlin, Germany; 8Department of Physics, Imperial College London, London, United Kingdom

High harmonic generation is particularly sensitive to band structure, making it a tool of choice to study all kind of complex dynamics in strongly correlated materials. We present a table-top all optical technique using high harmonic spectroscopy to probe the time-resolved electronic dynamics of the insulator-to-metal phase transition in vanadium dioxide. Our measurements are in good agreement with previous ultrafast electronic diffraction measurements and theoretical density functional calculations.



16:45 - 17:00
ID: 463 / TOM13 S11: 3
TOM 13 Ultrafast Optical Technologies and Applications

Tracing liquid-phase femtosecond dynamics in biomolecules and nano-solids using water-window X-ray transient absorption spectroscopy

Tadas Balciunas1,2, Yi-Ping Chang1, Zhong Yin2, Vit Svoboda2, Jean-Pierre Wolf1, Hans Jakob Wörner2

1GAP-Biophotonics, Université de Genéve, 1205 Geneva, Switzerland; 2Laboratory for Physical Chemistry, ETH Zürich, 8093 Zürich, Switzerland

We demonstrate femtosecond time–resolved soft–X–ray absorption spectroscopy of liquid samples using table-top high-order harmonic source in the water-window spectral range. The proof-of-principle measurements of dynamics in photoionized liquid alcohols, and UV-excited small heterocyclic hydrocarbons reveal the intermolecular interaction effects on the dynamics. In the time domain, our measurements resolve the gradual appearance of absorption features due to multi-photon induced dynamics in liquid alcohols at carbon K-edge, aqueous solutions at nitrogen K-edge and charge dynamics in TiO2 colloidal suspension probed at Ti L2,3-edge with a temporal resolution of ∼30 fs.



17:00 - 17:15
ID: 289 / TOM13 S11: 4
TOM 13 Ultrafast Optical Technologies and Applications

Dynamical imaging of local photovoltage at semiconductor surface by photo-assisted ultrafast scanning electron microscopy

Mohamed Zaghloul1,3, Silvia Maria Pietralunga2,3, Gabriele Irde1,3, Vittorio Sala1,3, Giulio Cerullo1, Hao Chen1,3, Giovanni Isella4, Guglielmo Lanzani1,3, Maurizio Zani1, Alberto Tagliaferri1,3

1Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci, 32, 20133 Milano, Italy; 2Institute for Photonics and Nanotechnologies (IFN)—National Research Council (CNR), Piazza L. da Vinci, 32, 20133 Milano, Italy; 3CNST@PoliMi, Istituto Italiano di Tecnologia (IIT), Via Giovanni Pascoli 70/3, Milano, Italy; 4LNESS-Dipartimento di Fisica, Politecnico di Milano, Piazza Leonardo da Vinci 32, 20133 Milano, Italy

Photo-assisted Ultrafast Scanning Electron Microscopy (USEM) dynamically maps surface photovoltages and local electric fields in semiconducting samples. Photovoltages and their gradients close to the emission at surface affect the yield and the detection efficiency of secondary electrons (SE). In this work, we present a method to characterize the evolution of photo-excited SE 2D patterns up to ultrafast regime. These results reveal the role of surface states in affecting the external field dynamics at picoseconds. Moreover, we show that tiny changes in surface preparation express deeply different photo-excited voltage signals.



17:15 - 17:30
ID: 398 / TOM13 S11: 5
TOM 13 Ultrafast Optical Technologies and Applications

Study of the ultrafast electron-temperature dynamics in photo-excited Au nanoparticles by Transient Photoemission Spectroscopy

Maria Sygletou1, Stefania Benedetti2, Marzia Ferrera1, Gian Marco Pierantozzi3, Riccardo Cucini3, Giuseppe Della Valle4, Pietro Carrara5, Alessandro De Vita5, Alessandro di Bona2, Piero Torelli3, Daniele Catone6, Giancarlo Panaccione3, Maurizio Canepa1, Francesco Bisio7

1OptMatLab, Dipartimento di Fisica, Università di Genova, via Dodecaneso 33, I-16146 Genova, Italy; 2CNR-Istituto Nanoscienze, via Campi 213/a, 41125 Modena, Italy; 3Istituto Officina dei Materiali-CNR Laboratorio TASC, Area Science Park, S.S. 14, Km 163.5, Trieste I-34149, Italy; 4Dipartimento di Fisica, IFN-CNR, Politecnico di Milano, Piazza Leonardo da Vinci 32, I-20133 Milano, Italy; 5Dipartimento di Fisica, Università degli Studi di Milano, via Celoria 16, Milano, Italy; 6Istituto di Struttura della Materia - CNR (ISM-CNR) EuroFEL Support Laboratory (EFSL), via del Fosso del Cavaliere, 100 I-00133 Rome, Italy; 7CNR-SPIN, Istituto Superconduttori Materiali Innovativi e Dispositivi, C.so Perrone 24, I-16152 Genova, Italy

We measured the femtosecond evolution of the electronic temperature of laser-excited gold nanoparticles, by means of ultrafast time-resolved photoemission spectroscopy induced by extreme-ultraviolet radiation pulses. The temperature of the electron gas was deduced by recording and fitting high-resolution photoemission spectra around the Fermi edge of gold nanoparticles providing a direct, unambiguous picture of the ultrafast electron-gas dynamics.



17:30 - 17:45
ID: 396 / TOM13 S11: 6
TOM 13 Ultrafast Optical Technologies and Applications

Real-time full-field characterization of ultrafast soliton fission induced by modulation instability

Francesca Gallazzi1, Shanti Toenger1, Mikko Närhi1, John M. Dudley2, Goëry Genty1

1Photonics Laboratory, Tampere University, Finland; 2institut FEMTO-ST, Université Bourgogne Franche-Comté

We present a real-time measurement technique based on Fourier Transform spectral interferometry coupled with a broadband reference pulse for the full-field characterization of broadband ultrafast complex pulses. With the proposed method we analyse noise-seeded modulation instability inducing soliton fission with a 20 fs resolution. We record the spectral interference between our test and reference pulse and retrieve complete field information using Fourier Transform Spectral interferometry pulse reconstruction. Experimental results are in good agreement with numerical simulations.

 
Date: Thursday, 16/Sept/2021
8:15 - 9:45TOM13 S12: Ultrafast: Generation and characterization of few-cycle pulses
Location: Aula 1
Session Chair: Christoph M. Heyl, DESY & Helmholtz-Institute Jena, Germany
 
8:15 - 8:30
ID: 436 / TOM13 S12: 1
TOM 13 Ultrafast Optical Technologies and Applications

Tunable isolated attosecond pulses generated by synthesized optical waveforms

Roland E. Mainz1,2, Giulio Maria Rossi1,2, Yudong Yang1,2, Fabian Scheiba1,2, Miguel A. Silva-Toledo1,2, Giovanni Cirmi1,2, Franz X. Kärtner1,2

1Center for Free-Electron Laser Science, Deutsches Elektronen-Synchrotron DESY, Hamburg; 2Physics Department and The Hamburg Centre for Ultrafast Imaging, University of Hamburg

Energetic ultrashort pulses with durations below one optical cycle are highly intriguing for attosecond science among other strong-field driven applications. For the generation of such sub-cycle pulses a coherent bandwidth wider than one octave is required. We recently pioneered the generation of such millijoule level sub-cycle pulses using parametric waveform synthesis (PWS). With such pulses, we achieve direct isolated attosecond pulse generation via high-harmonic generation without the need for additional gating techniques. Additionally the PWS offers to manipulate the synthesized waveform, giving precise tuning capability to shape the attosecond pulses.



8:30 - 8:45
ID: 195 / TOM13 S12: 2
TOM 13 Ultrafast Optical Technologies and Applications

Wavelength-tunable few-cycle pulses with millijoule-level pulse energies in the short-wavelength IR for ultrafast control of molecular dynamics

Patrick Rupprecht, Lennart Aufleger, Alexander Magunia, Stefano Amberg, Nikola Mollov, Felix Henrich, Christian Ott, Thomas Pfeifer

Max-Planck-Institut für Kernphysik, Saupfercheckweg 1, 69117 Heidelberg, Germany

We present a flexible few-cycle pulsed laser source in the short-wavelength infrared spectral region. It combines a quasi-continuous center wavelength tunability over one octave (1–2 µm) with a millijoule-level output and an exceptional long-term stability (<1.2% rms over >160 h at 1750 nm center wavelength). This is realized by spectral broadening in a 3.2m stretched hollow-core fiber with adaptable focusing optics, few-cycle bulk compression and extensive characterization of the pulses. The 1 kHz repetition-rate source is utilized for soft x-ray high-order harmonic generation and subsequent strong-field transient-absorption experiments.



8:45 - 9:15
Invited
ID: 187 / TOM13 S12: 3
TOM 13 Ultrafast Optical Technologies and Applications

New platforms for generating and characterizing few-cycle laser waveforms

Michael Chini

University of Central Florida, United States of America

Attosecond science relies upon the generation, characterization, and control of intense, few-cycle laser pulses with well-controlled electric field waveforms. Generating such pulses has, for decades, relied upon state-of-the-art laser systems accessible in only a few laboratories worldwide, while characterization of their electric field waveforms has required complex pump-probe setups. In this talk, I will show that the delayed rotational nonlinearity of molecular gases can be harnessed for extreme compression and frequency conversion of industrial-grade lasers, and I will present a new technique for single-shot characterization of the generated laser waveforms.



9:15 - 9:30
ID: 180 / TOM13 S12: 4
TOM 13 Ultrafast Optical Technologies and Applications

Characterization of mid-infrared few-cycle pulses: temporal profile and CEP stability

Adrien Leblanc1,2

1LOA, CNRS, France; 2INSTN-EMT, Varennes, CA

We report on three novel tools to generate and characterize few-cycle pulses in the mid-infrared. This toolbox enables the generation of high mid-infrared fields, and the characterization of their temporal profiles and carrier-to-envelop phase stability.



9:30 - 9:45
ID: 399 / TOM13 S12: 5
TOM 13 Ultrafast Optical Technologies and Applications

Rotational Doppler effect for characterizing femtosecond laser pulses

Pierre Béjot1, Ester Szmygel1,2, Antoine Dubrouil2, Franck Billard1, Olivier Faucher1, Edouard Hertz1

1Laboratoire Interdisciplinaire Carnot de Bourgone, France; 2Femto Easy

A new variant of SPIDER (Spectral Phase Interferometry for Direct Electric field Reconstruction) method is presented. The method called DEER-SPIDER for Doppler Effect E-field Replication is based on a non-standard effect, the so-called “rotational Doppler effect”, for producing the frequency shear. It provides a spectral shearing at/near the fundamental wavelength, enabling operation of the technique in the ultraviolet spectral range. The method, evaluated under two different conditions, provide reconstructions of high reliability. Possible improvements and outlook are discussed

 
10:15 - 11:00Plenary speech: Giulio Cerullo
Location: Aula 1
Session Chair: Ariel Levenson, C2N - CNRS, France

Giulio Cerullo

Professor
Politecnico di Milano, Italy

 

Giulio Cerullo is a Full Professor with the Physics Department, Politecnico di Milano, where he leads the Ultrafast Optical Spectroscopy laboratory. Prof. Cerullo’s research activity covers a broad area known as “Ultrafast Optical Science”, and concerns on the one hand pushing our capabilities to generate and manipulate ultrashort light pulses, and on the other hand using such pulses to capture the dynamics of ultrafast events in bio-molecules, nanostructures and two-dimensional materials (graphene, transition metal dichalcogenides). He has published more than 450 papers which have received more than 22000 citations (H-index: 78). He is a Fellow of the Optical Society of America and of the European Physical Society and Chair of the Quantum Electronics and Optics Division of the European Physical Society. He is on the Editorial Advisory Board of the journals Optica, Laser&Photonics Reviews, Scientific Reports, Chemical Physics, Journal of Raman spectroscopy. He is General Chair of the conferences CLEO/Europe 2017, Ultrafast Phenomena 2018 and the International Conference on Raman Spectroscopy 2020.
 

Title: Ultrafast optical response of two-dimensional materials

Layered materials are solids consisting of crystalline sheets with strong in-plane covalent bonds and weak van der Waals out-of-plane interactions. These materials can be easily exfoliated to a single layer (1L), obtaining two-dimensional (2D) materials with radically novel physico-chemical characteristics compared to their bulk counterparts. The field of 2D materials began with graphene and quickly expanded to include semiconducting transition metal dichalcogenides (TMDs). 2D materials exhibit very strong light-matter interaction and exceptionally intense nonlinear optical response, enabling a variety of novel applications in optoelectronics and photonics. This talk will review our studies on the ultrafast non-equilibrium and nonlinear optical response of 2D materials. We will discuss ultrafast carrier and spin dynamics in 2D semiconductors and their heterostructures. We will also show gate-tunable absorption saturation and third-harmonic generation in 1L-graphene and optical parametric amplification in 1L-TMDs.

 
ID: 105
Plenary talks

Ultrafast optical response of two-dimensional materials

Giulio Cerullo

Politecnico di Milano, Italy

Layered materials are solids consisting of crystalline sheets with strong in-plane covalent bonds and weak van der Waals out-of-plane interactions. These materials can be easily exfoliated to a single layer (1L), obtaining two-dimensional (2D) materials with radically novel physico-chemical characteristics compared to their bulk counterparts. The field of 2D materials began with graphene and quickly expanded to include semiconducting transition metal dichalcogenides (TMDs). 2D materials exhibit very strong light-matter interaction and exceptionally intense nonlinear optical response, enabling a variety of novel applications in optoelectronics and photonics. This talk will review our studies on the ultrafast non-equilibrium and nonlinear optical response of 2D materials. We will discuss ultrafast carrier and spin dynamics in 2D semiconductors and their heterostructures. We will also show gate-tunable absorption saturation and third-harmonic generation in 1L-graphene and optical parametric amplification in 1L-TMDs.

 
11:15 - 12:45TOM13 S13: Ultrafast: Nonlinear compression 2
Location: Aula 1
Session Chair: Jan Rothhardt, Helmholtz-Institute Jena, Germany
 
11:15 - 11:30
ID: 166 / TOM13 S13: 1
TOM 13 Ultrafast Optical Technologies and Applications

Two-stage multi-pass cell scheme for kilowatt-class compression of millijoule-class pulses to the few-cycle regime

Christian Grebing1,2, Michael Müller1, Joachim Buldt1, Henning Stark1, Jens Limpert1,2,3

1Institute of Applied Physics, Abbe Center of Photonics, Friedrich Schiller University Jena, Germany; 2Fraunhofer Institute for Applied Optics and Precision Engineering, Jena, Germany; 3Helmholtz-Institute Jena, Germany

We demonstrate two multi-pass cell post-compression stages that are optimized for operation at highest average power. In the first stage the pulse duration of 1-mJ 200-fs pulses with up to 1 kW average power is compressed to 31 fs with 96% efficiency yielding the highest average power for sub-100-fs pulses demonstrated to date. This is followed by a second compression stage employing ultra-broadband reflectivity enhanced silver mirrors on a silicon substrate to minimize heating induced aberrations. The second stage supports further compression of the pulse duration to <7 fs at an average power of 388 W with 82% transmission, again an average power record for few-cycle bandwidth pulses. The output of both stages is characterized and shows essentially no loss in terms of beam quality and spatiospectral homogeneity.



11:30 - 11:45
ID: 225 / TOM13 S13: 2
TOM 13 Ultrafast Optical Technologies and Applications

Post-compression of high-peak power pulses in a compact bulk multi-pass cell

Ann-Kathrin Raab1, Marcus Seidel2, Ivan Sytcevich1, Chen Guo1, Gunnar Arisholm3, Anne l'Huillier1, Cord L. Arnold1, Anne-Lise Viotti1,2

1Department of Physics, Lund University, P.O. Box 118, SE-221 00 Lund, Sweden; 2Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany; 3FFI (Norwegian Defence Research Establishment), P.O. Box 25, NO-2027, Kjeller, Norway

We demonstrate efficient post-compression of a 30 W, 0.46 GW peak power Yb source with 250 fs initial pulse duration, down to 31 fs (FWHM) in a bulk multi-pass cell (MPC). The bulk compression setup is compact, based only on off-the-shelf optics and features a total transmission of about 85 %. To the best of our knowledge, this constitutes the highest peak power in bulk MPC compression to-date, competing with gas-based post-compression solutions such as hollow-core fibers or gas-filled MPCs for a similar laser parameter range.



11:45 - 12:00
ID: 244 / TOM13 S13: 3
TOM 13 Ultrafast Optical Technologies and Applications

Pulse post-compression via multi-pass cells for FEL pump-probe experiments at FLASH

Anne-Lise Viotti1,2, Marcus Seidel1, Skirmantas Alisauskas1, Esmerando Escoto1, Henrik Tünnermann1, Katharina Dudde1, Ayhan Tajalli1, Bastian Manschwetus1, Ingmar Hartl1, Christoph M. Heyl1,3,4

1Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany; 2Department of Physics, Lund University, P.O Box 118, SE-221 00 Lund, Sweden; 3Helmholtz-Institute Jena, Fröbelstieg 3, 07743 Jena, Germany; 4GSI Helmhotzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany

The soft x-ray Free-Electron Laser (FEL) FLASH is a unique tool to study ultrafast processes and is mostly used for pump-probe experiments in combination with an optical laser. Within the framework of the FLASH2020+ facility upgrade, the currently operating Ti:Sapphire and OPCPA systems will be largely replaced by high-power Yb:YAG lasers combined with nonlinear pulse compression in multi-pass cells (MPCs). This approach offers superior compactness, efficiency and simplicity of the optical laser systems. We here present first example implementations of MPC compression-based pump-probe laser systems.



12:00 - 12:15
ID: 389 / TOM13 S13: 4
TOM 13 Ultrafast Optical Technologies and Applications

10mJ Hollow-Core Fiber compression at 250W average power with 90% efficiency

Derrek Wilson1,2, Maksym Ivanov1,2, Gabriel Tempea1, Alexis Labranche1, Alicia Ramirez1, Francois Legare2, Clement Paradis3, Arvid Hage3, Torsten Mans3, Carlos Trallero-Herrero4, Bruno Eugen Schmidt1

1few-cycle Inc., Canada; 2INRS, Canada; 3Amphos GmbH, Germany; 4University of Connecticut, USA

We developed a high transmission Hollow-core fiber (HCF) with 1mm ID that supports 97% absolute transmission over 1m of propagation when coupled with lower power regenerative amplifiers. By adding appropriate thermal management to the system, we were able to achieve about 30 times spectral broadening of 11mJ, 1.5ps pulses from a 275W, 25 kHz InnoSlab multi-pass amplifier with 90% fiber transmission. The spectrum achieved in 1 bar Kr supports to a 50fs TL bandwidth. At the conference we plan to present first tests towards J level energy and kW level average power handling.



12:15 - 12:30
ID: 301 / TOM13 S13: 5
TOM 13 Ultrafast Optical Technologies and Applications

Post-pulse compression of 8.6 mJ pulses using a compact multi-pass cell

Praveen Kumar Velpula1, Supriya Rajhans1, Esmerando Escoto1, Rob Shalloo1, Bonaventura Farace1, Kris Poder1, Jens Osterhoff1, Wim P. Leemans1, Ingmar Hartl1, Christoph M. Heyl1,2,3

1Deutsches Elektronen-Synchrotron DESY, Notkestraße 85, 22607 Hamburg, Germany; 2Helmholtz-Institute Jena, Fröbelstieg 3, 07743 Jena, Germany; 3GSI Helmholtzzentrum für Schwerionenforschung GmbH, Planckstraße 1, 64291 Darmstadt, Germany.

We present post-pulse compression of a 8.6 mJ, 1.2 ps Yb:YAG laser to a pulse duration of 44 fs at 1 kHz repetition rate in a single compression stage employing a 2m long, Ar filled-multi-pass cell reaching a transmission efficiency greater than 93%.



12:30 - 12:45
ID: 450 / TOM13 S13: 6
TOM 13 Ultrafast Optical Technologies and Applications

Sub-two-cycle pulses in the mid-IR based on thin plate compression at high average power

Mate Kurucz1,2, Roland Flender1, Krishna Murari1, Ugnius Gimzevskis3, Arturas Samalius3, Dominik Hoff4, Balint Kiss1

1ELI-ALPS, ELI-HU Non-Profit Ltd., Wolfgang Sandner utca 3., Szeged, H-6728, Hungary; 2University of Szeged, Dom ter 9., H-6720 Szeged, Hungary; 3OPTOMAN, Ukmerges g.427, Vilnius, LT-14185, Lithuania; 4Single Cycle Instruments, Hans-Knöll-Straße 6, 07745 Jena, Germany

Spectral broadening of 3.2 µm pulses is experimentally demonstrated at 8.2 W average power output through nonlinear propagation in the combination of a thin Si and BaF2 crystal plates. Sub-two-cycle compression was achieved, by compressing up to third order dispersion with the combination of bulk compressor and custom-made dispersive mirrors. Excellent long-term power, spectral and CEP stability was observed for a period of 4 hours.

 
15:00 - 15:45Plenary speech: Remus Nicolaescu
Location: Aula 1

Remus Nicolaescu

CEO/Co-founder
Pointcloud Inc, USA

Remus Nicolaescu is the Co-founder and CEO of Pointcloud Inc., a San Francisco based startup developing coherent 3D imaging solutions using silicon photonics. In 2017, together with a team at University of Southampton, he co-founded Pointcloud Inc., with the mission to create a versatile three-dimensional imaging platform using silicon photonics integration, that would enable 3D cameras to become as ubiquitous and performant as their 2D counterparts. Prior to Pointcloud he held executive roles with technology companies in the US, Europe and Asia. He started his career at Intel, where he performed pioneering work in silicon photonics: he was part of the team that demonstrated the first >1GHz silicon photonics modulator; he proposed and developed the research leading to the demonstration of optical Raman amplifiers and lasers in silicon photonics. He obtained his Masters and Ph.D. in Physics from University of Bucharest and Texas A&M University respectively, and MBA from INSEAD.

 

Title: Coherent focal plane arrays in silicon photonics, towards high performance 3D Imaging using LIDAR

Accurate 3D imaging is essential for machines to map and interact with the physical world. While numerous 3D imaging technologies exist, each addressing niche applications with varying degrees of success, none have achieved the breadth of applicability and impact that digital image sensors have achieved in the 2D imaging world. A large-scale, two-dimensional focal plane array of coherent detector pixels operating as a light detection and ranging (LiDAR) system could serve as the core of a universal 3D imaging platform. It would enable megapixel resolution, high depth accuracy, immunity to interference from sunlight, as well as the ability to directly measure the velocity of moving objects. This talk will present an overview of architectural implementations of large-scale coherent focal plane arrays, and show results of their operation in a 4D imaging (3D + velocity) system. We will discuss performance characteristics, tradeoffs and design optimization for different applications. Finally, we will discuss future architectural implementations and opportunities for pixel size reduction to enable 10 megapixels and beyond coherent imaging cameras.

 

Remus Nicolaescu, StevenA.Fortune, Andrew J. Compston, Pointcloud Inc.; Ion E. Opris, Opris Consulting; David J. Thomson, University of Southampton; Christopher Rogers, Alexander Y. Piggott, Alexander Gondarenko, Pointcloud Inc.; Fanfan Meng, Xia Chen, Graham T. Reed, University of Southampton

 
ID: 118
Plenary talks

Coherent focal plane arrays in silicon photonics, towards high performance 3D Imaging using LIDAR

Remus Nicolaescu1, Steven A. Fortune1, Andrew J. Compston1, Ion E. Opris2, David J. Thomson3, Christopher Rogers1, Alexander Y. Piggott1, Alexander Gondarenko1, Fanfan Meng3, Xia Chen3, Graham T. Reed3

1Pointcloud Inc, United States of America; 2Opris Consulting; 3University of Southampton

Accurate 3D imaging is essential for machines to map and interact with the physical world. While numerous 3D imaging technologies exist, each addressing niche applications with varying degrees of success, none have achieved the breadth of applicability and impact that digital image sensors have achieved in the 2D imaging world. A large-scale, two-dimensional focal plane array of coherent detector pixels operating as a light detection and ranging (LiDAR) system could serve as the core of a universal 3D imaging platform. It would enable megapixel resolution, high depth accuracy, immunity to interference from sunlight, as well as the ability to directly measure the velocity of moving objects. This talk will present an overview of architectural implementations of large-scale coherent focal plane arrays, and show results of their operation in a 4D imaging (3D + velocity) system. We will discuss performance characteristics, tradeoffs and design optimization for different applications. Finally, we will discuss future architectural implementations and opportunities for pixel size reduction to enable 10 megapixels and beyond coherent imaging cameras.

 
16:00 - 17:30TOM13 S14: Ultrafast: Thz science and nonlinear optics
Location: Aula 1
Session Chair: Konstantin Vodopyanov, Univ. Cent. Florida, United States of America
 
16:00 - 16:30
Invited
ID: 478 / TOM13 S14: 1
TOM 13 Ultrafast Optical Technologies and Applications

Advances in high-average power ultrafast THz sources

Frank Wulf, Tim Vogel, Samira Mansourzadeh, Felix Fobbe, Denizhan Kesim, Martin Saraceno, Clara Saraceno

Ruhr University Bochum, Germany

Ultrafast laser-driven THz sources for time-domain spectroscopy are a ubiquitous tool in many fields of science and are even starting to penetrate industrial fields. Whereas enormous progress has been achieved in achieving ultra-broadband operation and very high fields in the last decades, average power has for very long remained a bottleneck for many applications in spectroscopy and sensing. this talk, we will review recent progress in the generation and application of high-average power broadband Terahertz pulsed sources at MHz repetition rates for time-domain spectroscopy.



16:30 - 16:45
ID: 179 / TOM13 S14: 2
TOM 13 Ultrafast Optical Technologies and Applications

Fiber-laser driven gas-plasma based generation of high-power THz radiation

Joachim Buldt1, Henning Stark1, Michael Mueller1, Christian Grebing1,2, César Jauregui1, Jens Limpert1,2,3

1Institute of Applied Physics, Jena, Germany; 2Fraunhofer Institute for Applied Optics and Precision Engineering, Jena, Germany; 3Helmholtz-Institute, Jena, Germany

We present the generation of broadband terahertz radiation with the two-color gas plasma scheme. Driven by a multipass cell compressed high-power fiber laser system at a repetition rate of 200 kHz an average power of 94 mW is generated. A measurement based on the air-biased coherent detection scheme is used to characterize the full bandwidth of the generated pulses. By using the full potential of the driving laser further scaling of the generated THz power towards watt-level average power can be expected in the near future.



16:45 - 17:00
ID: 233 / TOM13 S14: 3
TOM 13 Ultrafast Optical Technologies and Applications

Electro-Absorption Modulation in colloidal Quantum Dots directly driven by MV/cm-THz Fields

Claudia Gollner1, Rokas Jutas1, Dimitry Dirin2,3, Simon Boehme2,3, Andrius Baltuška1,4, Maksym Kovalenko2,3

1TU Wien, Austria; 2Institute of Inorganic Chemistry, Switzerland; 3Empa-Swiss Federal Laboratories for Materials Science and Technology, Switzerland; 4Center for Physical Sciences & Technology, Lithuania

We report on a direct all optical encoding of a free-space terahertz signal onto an optical signal probing the absorption of CdSe/CdS quantum dots. The ultrafast electro-absorption modulator is based on the quantum confined stark effect. This method demonstrates the ability for high speed modulators with transition rates in the Tbit/s range and extinction ratio exceeding 6 dB. An extreme change in transmission of more than 15% is measured, which is, to the best of our knowledge, the highest value ever reported for solution processed electro-absorption materials at room temperature.



17:00 - 17:30
Invited
ID: 555 / TOM13 S14: 4
TOM 13 Ultrafast Optical Technologies and Applications

Time and frequency-resolved nonlinear optical spectroscopy with amplified femtosecond pulse bursts

Andrius Baltuska

TU Wien, Austria

We present the methods for controlled pulse burst amplification in a single and dual femtosecond regenerative amplifier that enable a plethora of third and higher-order nonlinear spectroscopic techniques. High-resolution time-delay scans and narrowband frequency sweeping is obtained without any mechanically moving parts.

 
Date: Friday, 17/Sept/2021
8:15 - 9:45TOM13 S15: Ultrafast: Nonlinear effects in optical fibers
Location: Aula 1
Session Chair: Christopher Phillips, ETH Zurich, Switzerland
 
8:15 - 8:45
Invited
ID: 251 / TOM13 S15: 1
TOM 13 Ultrafast Optical Technologies and Applications

Ultrafast soliton-driven light sources based on gas-filled hollow-fibre nonlinear optics

John C. Travers, Christian Brahms, Teodora F. Grigorova, Athanasios Lekosiotis, Federico Belli

Heriot-Watt University, United Kingdom

Soliton-driven frequency conversion provides an exceptionally versatile source of tuneable pulses for ultrafast science. A simple experimental setup using gas-filled hollow-fibres can continuously tune few-femtosecond pulses from the vacuum ultraviolet (around 100 nm) to the near infrared (750 nm), with high efficiency. This technique can be scaled in repetition rate: so far we have reached 50 kHz (limited by our pump laser). It can also produce circularly polarised ultraviolet pulses. Furthermore, soliton self-compression in the same system can be harnessed to produce terawatt-scale sub-cycle pulses in the infrared spectral region.



8:45 - 9:00
ID: 341 / TOM13 S15: 2
TOM 13 Ultrafast Optical Technologies and Applications

Post compression and broadly tunable frequency conversion via Stimulated Raman scattering for high-peak power pulses

Paolo Antonio Carpeggiani1, Valentina Shumakova1, Martin Kirchner1, Markus Zeiler1, Giulio Coccia1, Guangyu Fan1,2, Edgar Kaksis1, Audrius Pugzlys1,3, Andrius Baltuska1,3, Riccardo Piccoli2, Young-Gyun Jeong2, Andrea Rovere2, Roberto Morandotti2,4, Luca Razzari2, Bruno Schmidt5, Vladimir Pervak6,7, Alexander A. Voronin8,9, Aleksei Zheltikov8,9,10

1Institut für Photonik, Technische Universität Wien, Gußhausstrasse 27/387, 1040 Vienna, Austria; 2Institut National de la Recherche Scientifique (INRS), Centre Énergie, Matériaux et Télécommunications (EMT), Varennes, Québec J3X 1S2, Canada; 3Center for Physical Sciences and Technology, Savanoriu Ave. 231, LT-02300, Vilnius, Lithuania; 4Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu 610054, Sichuan, China; 5Few-Cycle Inc., 2890 Rue de Beaurivage, Montreal, Quebec H1L 5W5, Canada; 6Ludwig-Maximilians-Universität München, Department of Physics, Am Coulombwall 1, 85748 Garching, Germany; 7UltraFast Innovations GmbH, Am Coulombwall 1, 85748 Garching, Germany; 8Physics Department, International Laser Center, M. V. Lomonosov Moscow State University, Moscow 119992, Russia; 9Russian Quantum Center, Skolkovo, Moscow Region, 143025, Russia; 10Department of Physics and Astronomy, Texas A M University, College Station, Texas 77843, USA

We present a new technique for asymmetric spectral broadening of high-peak power pulses, which relies on the continuous red-shift provided by rotational, Stimulated Raman Scattering over the long propagation distance in a nitrogen-filled capillary. As a result, pulses can be compressed with a net shift of their central wavelength in the vicinity of their fundamental with high energy efficiency.

Potential applications include high harmonic generation with extended cut-off, frequency difference generation in the 5-9µm range, and filamentation-induced optical path cleaning for telecommunication in the atmosphere.



9:00 - 9:15
ID: 481 / TOM13 S15: 3
TOM 13 Ultrafast Optical Technologies and Applications

Novel soliton self-compression spectral dynamics in air-filled Kagome HCPCF

Martin Maurel1,2, Foued Amrani1,2, Ihar Babushkin3,4, Benoit Debord1,2, Frédéric Gérôme1,2, Fetah Benabid1,2

1GLOphotonics, 123 avenue Albert Thomas Limoges, France; 2GPPMM group, Xlim laboratory, CNRS- Université de Limoges, France; 3Institute of Quantum Optics, Leibnitz Hannover University, Hannover, Germany; 4Cluster of Excellence PhoenixD Welfengarten 1, 30167 Hannover, Germany

We report on a nonlinear compression down to 20 fs in air-filled HCPCF. Novel spectral-temporal dynamic is observed and analysed. The results represent a promising pathway for strong and stable compression of current commercial ultra-short-pulse lasers.



9:15 - 9:30
ID: 408 / TOM13 S15: 4
TOM 13 Ultrafast Optical Technologies and Applications

Octave-spanning infrared supercontinuum generation in a graded-index multimode Tellurite fiber

Ekaterina Krutova1, Zahra Eslami1, Tanvi Karpate2,3, Mariusz Klimczak3, Ryszard Buczynski2,3, Goëry Genty1

1Tampere University, Finland; 2Institute of Microelectronics and Photonics, Poland; 3University of Warsaw, Poland

We demonstrate the generation of an octave-spanning supercontinuum from 800 nm to 2800 nm in a tellurite multimode graded-index fiber. Our results show signatures of beam self-cleaning opening the way towards high-power supercontinuum light sources in the mid-infrared.



9:30 - 9:45
ID: 420 / TOM13 S15: 5
TOM 13 Ultrafast Optical Technologies and Applications

Towards advanced near-infrared spectroscopy at megahertz repetition rates

Anchit Srivastava1,2, Andreas Herbst1,2, Daniel Schade1,2, Mahdi Mohammadi Bidhendi1,2, Max Kieker1,2, Francesco Tani1, Hanieh Fattahi1,2

1Max-Planck-Institute for the Science of Light, Erlangen, Germany; 2Friedrich-Alexander University, Erlangen, Germany

We report on the efficient external pulse compression of 255 fs, 20 μJ, 2 MHz pulses of a Yb:YAG amplifier to 6.7 fs in two gas-filled photonic crystal fiber; and their broadband down conversion to 2 μm via intra-pulse difference frequency generation. The synchronized, high power, ultrashort pulses, with octave-separated centre frequencies are ideal for advanced near-infrared spectroscopy.

 
10:00 - 10:45Plenary speech Sophie Brasselet
Location: Aula 1
Session Chair: Nicolas Bonod, CNRS, France
 
ID: 113
Plenary talks

Polarized microscopy, towards molecular-organization imaging in cells and tissues

Sophie Brasselet

Institut Fresnel, France

Fluorescence imaging and nonlinear coherent optical microscopy can reveal important spatial properties in nanomaterials, cells and biological tissues from fixed situations to in vivo dynamics. While microscopy can guide interpretation through morphological observations at the sub-micrometric scale, optical imaging cannot directly access the way molecules are organized in specific ulstrastructures, occuring at the molecular scale. This property, which is important in many fields, from material engineering to biomechanics, is today most often studied using electron microscopy (EM) or X ray diffraction, which are not compatible with real time imaging. ... read more https://www.europeanoptics.org/pages/events/eosam2021/program/plenaries.html

 
11:15 - 12:45TOM13 S16: Ultrafast: High harmonic generation and XUV science 2
Location: Aula 1
Session Chair: Tenio Popmintchev, University of California San Diego, United States of America
 
11:15 - 11:30
ID: 321 / TOM13 S16: 1
TOM 13 Ultrafast Optical Technologies and Applications

A new tool for measuring ultrashort laser pulses directly on-target during high-intensity laser-matter interactions

Helder M. Crespo1,2, Tobias Witting3, Miguel Canhota2, Miguel Miranda4, John W.G. Tisch1

1Imperial College London, United Kingdom; 2Faculty of Sciences, University of Porto, Portugal; 3Max Born Institute for Nonlinear Optics and Short Pulse Spectroscopy, Berlin, Germany; 4Sphere Ultrafast Photonics, Porto, Portugal

We present a new technique for the temporal measurement of intense ultrashort laser pulses directly on target and at full laser power. The setup can be easily added to an existing beamline, providing pulse characterisation at the sample location. This allows pulse optimization and meaningful comparison with theory, while revealing potential pulse distortions occurring in or on the target. We demonstrate the technique by measuring intense 4-fs pulses in conditions optimized for high-harmonic generation and show that it enables measuring pulses at extreme relativistic intensities presently inaccessible to other diagnostics.



11:30 - 11:45
ID: 342 / TOM13 S16: 2
TOM 13 Ultrafast Optical Technologies and Applications

Controlling the focusing properties of attosecond XUV beams

Eric Constant1, Fabrice Catoire2, Kevin Veyrinas2, Constance Valentin2, Jan Vabek2,3,4, Eric Mevel2

1Université de Lyon, Université Claude Bernard Lyon 1, CNRS, Institut Lumière Matière (ILM), rue A. Byron, 69622 Villeurbanne, France; 2Université de Bordeaux, CNRS, CEA, Centre Laser Intenses et Applications (CELIA), 43 rue P. Noailles, 33400 Talence, France; 3ELI Beamlines Centre, Institute of Physics, Czech Academy of Sciences, Za Radnicí 835, 25241 Dolní Břežany, Czech Republic; 4Czech Technical University in Prague – Faculty of Nuclear Sciences and Physical Engineering, Jugoslávských partyzánů 1580/3, 160 00 Praha 6, Czech Republic

By controlling high order harmonic generation in gases and characterizing the XUV beams properties, we observe that high order harmonics are usually not all focused at the same longitudinal position. We show that this focusing can be modified by controling the XUV wavefront directly in the generating medium and achieve optics free focusing of the attosecond XUV beam with micrometer size of the XUV foci. We use this effect to perform broad band XUV spectral filtering with high efficiency and without temporal stretching of the attosecond pulses.



11:45 - 12:15
Invited
ID: 146 / TOM13 S16: 3
TOM 13 Ultrafast Optical Technologies and Applications

13 mW average power ultrafast HHG source

Robert Klas1,2, Alexander Kirsche1,2, Martin Gebhardt1,2, Joachim Buldt1, Henning Stark1, Steffen Hädrich3, Jan Rothhardt1,2,4, Jens Limpert1,2,4

1Institute of Applied Physics, Abbe Center of Photonics, Friedrich-Schiller-University Jena, Albert-Einstein-Str. 15, 07745 Jena, Germany.; 2Helmholtz-Institute Jena, Fröbelstieg 3, 07743 Jena, Germany.; 3Active Fiber Systems GmbH, Ernst-Ruska-Ring 17, 07745 Jena, Germany.; 4Fraunhofer Institute for Applied Optics and Precision Engineering, Albert-Einstein-Str. 7, 07745 Jena, Germany.

In this contribution, a novel class of extreme ultraviolet (XUV) sources based on high-harmonic-generation (HHG) is presented. The source realized in this work is driven by a frequency doubled and post compressed Yb-fiber laser system, delivering 51μJ, 18.6fs pulses at a central wavelength of 515nm and a repetition rate of 1MHz. Employing this unique laser system for HHG, results in a record high XUV average power of 12.9mW in a single harmonic line at 26.5eV with sub-6fs pulse duration – surpassing previously reported HHG sources by one order of magnitude.



12:15 - 12:30
ID: 443 / TOM13 S16: 4
TOM 13 Ultrafast Optical Technologies and Applications

Broadband UV-Vis frequency combs from high-harmonic generation in quasi-phase-matched waveguides

Jay Rutledge1, Anthony Catanese1, Daniel Hickstein2,3, Thomas Allison1, Scott Diddams2,3, Abijith Kowligy2,3

1Stony Brook University, USA; 2National Institute of Standards and Technology, USA; 3Dept. of Physics, University of Colorado, Boulder

We report efficient, phase-coherent high-harmonic generation in chirped periodically poled lithium niobate waveguides pumped with a watt-scale 3 $\mu$m frequency comb. Simulations support a mechanism of cascaded quadratic nonlinearity and provide insight into spectral optimization.



12:30 - 12:45
ID: 250 / TOM13 S16: 5
TOM 13 Ultrafast Optical Technologies and Applications

Raman red-shift compressor: A simple approach for scaling the high harmonic generation cut-off

Katherine Légaré1, Reza Safaei1, Guillaume Barrette1, Loïc Arias1, Philippe Lassonde1, Heide Ibrahim1, Boris Vodungbo2, Emmanuelle Jal2, Jan Lüning3, Nicolas Jaouen4, Andrius Baltuška5, François Légaré1, Guangyu Fan1

1Institut National de la Recherche Scientifique, Canada; 2Sorbonne Université, France; 3Helmholtz-Zentrum Berlin, Germany; 4Synchrotron SOLEIL, France; 5Vienna University of Technology, Austria

Propagation of sub-picosecond laser pulses in a gas-filled hollow-core fibre creates red-shifted multidimensional solitary states through intermodal Raman scattering. The pulses, which can be compressed to few-cycle durations by simple transmission through materials with positive dispersion, are used to generate high harmonics in argon. Due to the characteristics of the ultrashort driver pulses, the highest generated photon energy is increased, allowing for the implementation of photon-demanding applications with high photon energy requirements. As a demonstration, the source is used for resonant magnetic scattering measurements at the M2,3 edge of cobalt.

 
13:00 - 15:00Award Ceremony for Best student presentations
Location: Aula 1
13:00 - 15:00Grand Challenges of Photonics Session
Location: Aula 1
 
13:00 - 13:30
ID: 547
Grand Challenges of Photonics Session

Quantum network technology – the second life of rare-earth crystals

Wolfgang Tittel

QuTech & Kavli Institute of Nanoscience, Delft University of Technology, Netherlands, The

QuTech and Kavli Institute of Nanoscience, Delft Technical University, The Netherlands

Starting with the demonstration of lasing more than 50 years ago, the special properties of rare-earth ion doped crystals and glasses have given rise to the development of numerous solid-state lasers and amplifiers, which are crucial for the functioning of today’s world-wide Internet. As a fascinating generalization of their use in optical communication infrastructure, it became clear during the past decade that, when cooled to cryogenic temperatures of a few Kelvin, rare-earth crystals also promise the creation of technology for quantum communication networks.

I will discuss recent advances in my and other groups towards the development of key ingredients of such networks: the reversible storage of quantum states of light in large ensembles of rare-earth ions, as well as the creation of single photons using individual emitters. This work is interesting from a fundamental point of view, and furthermore paves the path towards a quantum repeater, which will ultimately enable quantum communications over arbitrary distances.



13:30 - 14:00
ID: 551
Grand Challenges of Photonics Session

Engineered nonlocalities in metasurfaces

Andrea Alú

Advanced Science Research Center, City University of New York, United States of America

In this talk, I will discuss our recent progress in the context of metasurfaces with tailored nonlocal responses. Based on these principles, I will describe opportunities for augmented reality, secure communications, analog optical computing and a new generation of light-emitting metasurfaces.



14:00 - 14:30
ID: 548
Grand Challenges of Photonics Session

Photo-acoustic detection of buried gratings

Paul Planken

Advanced Research Center for Nanolithography & University of Amsterdam, Netherlands, The

When nanostructures are buried underneath optically opaque layers, extremely-high-frequency. laser-induced ultrasound may be used to detect them, which has potential applications for wafer alignment. In this talk, results will be shown on femtosecond generation and detection of ultrasound to detect buried gratings. We show results on home-made samples consisting of gratings buried underneath up to 20 layers, and discuss possible methods to improve signal strength.

 

 
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