3:30pm - 4:00pmInvitedID: 537
/ TOM8 S02: 1
TOM 8 Ultrafast Optics
Robust GHz frequency combs: a new tool for many applications
Florian Emaury
Menhir Photonics, Switzerland
Robust GHz Frequency Combs: a new tool for many applications
4:00pm - 4:15pmID: 512
/ TOM8 S02: 2
TOM 8 Ultrafast Optics
Ultrafast Yb:CALGO laser oscillator based on cross-polarization pumping with a cost-efficient multi-mode diode
Firas Trawi, Jakub Drs, Michael Müller, Marin Hamrouni, Norbert Modsching, Valentin J. Wittwer, Thomas Südmeyer
University of Neuchatel, Switzerland
We demonstrate a multimode diode-pumped Yb:CALGO laser oscillator based on bandwidth-optimized cross-polarization pumping targeting sub-30-fs operation. In our first proof of principle experiment we achieved mode-locked operation at 83 MHz repetition rate with 0.4 W of average power and a 33-nm-bandwidth optical spectrum supporting sub-40-fs pulses. This concept offers a simple and cost-efficient alternative to green-pumped Ti:sapphire lasers.
4:15pm - 4:30pmID: 344
/ TOM8 S02: 3
TOM 8 Ultrafast Optics
Generation of phase-stable sub-mJ ultrashort laser pulse bursts with extremely high scalable pulse number
Vinzenz Stummer1, Tobias Flöry1, Matthias Schneller1, Edgar Kaksis1, Markus Zeiler1, Audrius Pugzlys1,2, Andrius Baltuska1,2
1TU Wien, Austria; 2Center for Physical Sciences & Technology, Lithuania
We demonstrate generation of bursts that consist of up to 40 ultrashort pulses with 10 μJ pulse energy, 250 fs pulse duration and an ultrashort tunable spacing, from picoseconds to nanoseconds, corresponding to a terahertz intraburst repetition rate. This was achieved by the build-up of a novel thermally-stable sub-mJ Vernier Regenerative Amplifier (RA), whose round-trip detuning is similar to its master oscillator round-trip time. The RA includes two cavities pumped from a common diode, and is able to provide for either 2 bursts (one burst out of each cavity), or for one burst and a synchronous reference pulse for characterization.
4:30pm - 4:45pmID: 231
/ TOM8 S02: 4
TOM 8 Ultrafast Optics
Advances on Percussion Drilling with Femtosecond Laser in GHz-burst Mode
Pierre Balage1, Théo Guilberteau1, Manon Lafargue1,2, Guillaume Bonamis2, Clemens Hönninger2, Jie Qiao1,3, John Lopez1, Inka Manek-Hönninger1
1Université de Bordeaux, CNRS, CEA, CELIA UMR5107, France; 2Amplitude, France; 3Chester F. Carlson Center for Imaging Science, Rochester Institute of Technology, 54 Lomb Memorial Dr., Rochester, New York 14623, USA
Micromachining of various materials with femtosecond lasers operating in the GHz-burst regime has recently attracted great attention. In this contribution, we show our latest results on top-down percussion drilling in different dielectrics in this new operating regime. The dependence on the burst parameters such as burst repetition rate, number of pulses per burst, and burst energy are discussed. Moreover, we will focus on the influence of the burst shape on the drilling process. The quality of the drilled holes and their reachable dimensions are presented.
4:45pm - 5:00pmID: 249
/ TOM8 S02: 5
TOM 8 Ultrafast Optics
Bifurcations and spectral pulsations in ultrafast fiber lasers
Aurélien Coillet1, Zhiqiang Wang2, Said Hamdi1, Zuxin Zhang3, Philippe Grelu1
1Université de Bourgogne, Laboratoire ICB, Dijon, France; 2Anhui University, Hefei, China; 3Nanjing University of Posts and Telecommunications, Nanjing, China
We employ real-time spectral measurements to investigate the transitions from the stable mode locking to period doubling and long-period pulsations. We highlight the role of self-phase modulation as a general mechanism triggering period-2 bifurcations. We analyze the new frequencies generated during the sequence of bifurcations and report an entrainment where the period of the long oscillation locks to multiples of the cavity roundtrip time.
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