8:30am - 9:00amInvitedID: 528
/ TOM7 S04: 1
TOM 7 Optical frequency combs
An optical frequency comb as a scalable source for multi-Pbit/s data transmission systems
Leif Oxenlowe
Technical University of Denmark, Denmark
In this talk, I will consider optical comb sources characterised by a certain bandwidth, comb line power and background noise level, and discuss requirements to such combs in order to qualify as sources in coherent optical communication systems. I will describe how, that for comb line powers and performances already achievable by integrated micro-ring resonators, a single comb source could act as a highly scalable multi-wavelength (WDM)-source for multi-Pbit/s spatially multiplexed (SDM) systems. I will discuss the possibilities of using a single comb source to support 10s Pbit/s data transmission, and how the scaling to capacities beyond that, is promising. I will discuss using a single comb source for ultra-long-haul transmission systems, such as trans-oceanic reaches of e.g. 8.000 km, and I will show how a comb source performs just as well as a bank of individual lasers, with the added benefit of the possibility to reduce the spectral guard-band, thus increasing the spectral efficiency.
9:00am - 9:15amID: 398
/ TOM7 S04: 2
TOM 7 Optical frequency combs
Digital holography with microcombs
Stephan Amann1, Bingxin Xu1, Yang He2, Edoardo Vicentini3, Theodor W. Hänsch1,4, Qiang Lin2, Kerry Vahala5, Nathalie Picqué1
1Max Planck Institute of Quantum Optics, DE-85748 Garching, Germany; 2Department of Electrical and Computer Engineering, University of Rochester, Rochester, New York 14627, USA; 3CIC nanoGUNE BRTA, 20018 Donostia-San Sebastián, Basque Country, Spain; 4Faculty of Physics, Ludwig-Maximilian University of Munich, DE-80539 Munich, Germany; 5T.J. Watson Laboratory of Applied Physics, California Institute of Technology, Pasadena, California 91125, USA
Optical microresonators are attractive comb sources due to their small form factor and stable broad optical spectra. We report on the first demonstration of microcomb-based digital holography. The large line spacing of microcombs promises an unprecedented combination of precision, fast update rate and ambiguity ranges on the scale of a few mm. Using a pulse-driven lithium niobate microcomb of 100 GHz line spacing and a scanning Michelson interferometer, we generate spectral hypercubes of holograms. Our first experimental results show that the amplitude and phase information of the object can be recovered for more than 100 comb lines.
9:15am - 9:30amID: 383
/ TOM7 S04: 3
TOM 7 Optical frequency combs
Synthetic self-injection locked microcombs for deterministic single soliton operation
Alexander Ulanov1, Thibault Wildi1, Nikolay G. Pavlov2, John D. Jost2, Maxim Karpov2, Tobias Herr1,3
1Deutsches Elektronen-Synchrotron (DESY), Germany; 2Enlightra Sarl, Switzerland; 3Physics Department, Universität Hamburg UHH, Germany
Self-injection locking to a photonic crystal ring-microresonator with synthetic back-reflection is demonstrated for the first time. The on-chip system permits deterministic generation of exclusively single-soliton microcombs and does not rely on random backscattering from defects or imperfections.
9:30am - 9:45amID: 201
/ TOM7 S04: 4
TOM 7 Optical frequency combs
Double-frequency-comb-like source with PM passive fibre cavity and Gain Through Filtering.
Stefano Negrini1, Auro M. Perego2, Matteo Conforti3, Arnaud Mussot1
1PhLam, University of Lille, France; 2Aston University, Birmingham, UK; 3PhLam, CNRS, University of Lille, France
In this work, we present a theoretical and numerical study about the generation of double- frequency-comb-like source with Gain Through Filtering (GTF) in passive Polarization Maintaining (PM) fibre ring cavity.
GTF is a nonlinear phenomenon which allows the formation of MI sidebands whose frequencies position is dependant by the central frequency of a spectral filter. By exploiting a PM fibre Bragg grating, and its double central frequency nature, we are able to generate a double-frequency-comb like spectrum, i.e, a spectra on each polarization with a spectral separation equals to the separation of the filter's components.
9:45am - 10:00amID: 461
/ TOM7 S04: 5
TOM 7 Optical frequency combs
Nonlinear frequency chirps from a stabilized injected phase-modulated fiber laser loop
Marc Brunel, Ludovic Frein, Goulc'hen Loas, Anthony Carré, Thomas Le Beux, Nacim Tolba, Mehdi Alouini, Hugues Guillet de Chatellus, Marc Vallet
Univ Rennes, CNRS, Institut Foton – UMR 6082, 35000 Rennes, France
A phase-modulated frequency-shifting loop is injected by a single-frequency laser at 1.5 µm. In so-called Talbot conditions, i.e., when the modulation frequency is an integer multiple of the inverse of the cavity round-trip time, the loop generates a frequency comb whose temporal trace consists in a train of pulse doublets whose positions in time depend on the frequency of the injection laser. When the modulation frequency is slightly detuned from the Talbot condition, nonlinear frequency chirps are predicted and observed in the output pulse train. We demonstrate that these nonlinear chirps are not restricted to sinusoidal shapes, and also that the loop can be stabilized by exploiting the intracavity phase modulation.
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