Tuneable optical frequency combs generation in driven nonlinear resonators via dissipation induced modulation instability
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Tuneable optical frequency combs generation in driven nonlinear resonators via dissipation induced modulation instability
Wed, 13/10/2021 - 15:00 to 16:00
Location:
Speaker:
Dr Auro Perego
Affiliation:
Aston Institute of Photonics Technology (AIPT), Aston University
Synopsis:
Nonlinear instabilities of homogeneous states, and the associated self-organizing pattern formation process, are ubiquitous in natural systems and occur in a vast range of different scenarios including fluids, plasmas, chemical reactions, Bose-Einstein condensates, and light waves. In technological devices, instabilities are in general considered as undesired effects which damage the correct operation of a system and need to be suppressed. In this talk I will present the modulation instability of light caused by spectral filtering (unbalanced losses/dissipation for signal and idler waves) and discuss its potential to provide amplification when standard phase-matching conditions cannot be satisfied. In particular, I will show how this instability can be engineered and exploited to generate optical frequency combs with tuneable repetition rate in passive driven nonlinear resonators.
References:
-A. Perego et al., "Gain through losses in Nonlinear Optics”, Light: Science & Applications, 7, 43 (2018)
-F. Bessin, et al., "Gain-through-filtering enables tuneable frequency comb generation in passive optical resonators”, Nature Communications 10, 4489 (2019)
-A. Perego et al., "Theory of filter-induced modulation instability in driven passive optical resonators”, Physical Review A 103, 015322 (2021)
Biography:
Dr. Auro Perego is a Royal Academy of Engineering Research Fellow at the Aston Institute of Photonic Technologies, AstonUniversity(Birmingham, UK). Auro graduated in Physics and obtained his Masters in Physics from the Università degli Studi dell’Insubria (Como, Italy) and in 2018 received his PhD in Electrical Engineering from AstonUniversity. His research interests are located at the boundaries between Physics and Engineering focussing especially on laser physics, mode-locking and generation of light pulses, nonlinear effects in fibre optics, solitons, parametric amplification, optical frequency combs, and instabilities in nonlinear optical systems.