Self emerging laser cavity solitons as dominant attractor of a microcomb system
Speaker: Prof. Alessia Pasquazi
(Professor of Nonlinear Optics, Ernest Rutherford Fellow, ERC Laureate, Emergent Photonics Research Centre and Dept. of Physics, Loughborough University)
Title: Self emerging laser cavity solitons as dominant attractor of a microcomb system
Abstract: Optical frequency comb in microresonators, or ‘microcombs’, are optical sources composed of a set of equally spaces frequency lines obtained in nonlinear microcavities usually by Kerr nonlinearity. The discovery of dissipative temporal cavity solitons has been a fundamental breakthrough and allowed to achieve a broad, smooth spectrum particularly suitable for metrological comb applications.
More recently, we demonstrated that it is possible to generate localized pulses in a configuration where the micro-cavity is inserted in a fiber laser loop. We reported the observation of laser cavity-solitons , which have previously attracted large attention, especially in spatial configurations. By merging their properties with the physics of both micro-resonators and multi-mode systems, this scheme represents a fundamentally new paradigm for the generation, stabilization, and control of solitary optical pulses in micro-cavities.
In this framework, it is important to discuss the main physical features of these types of waves, including the energy efficiency and their dynamical properties, which are key for the initiation and recovery of the system. Moreover, we recently demonstrated that they can self-emerge and robustly recover .
Here we discuss the fundamental mechanism that transforms the laser cavity solitons in the dominant attractors of a microcomb system based on a Kerr microresonator nested in an amplifying cavity. Particularly, we discuss the effect of the slow nonlinearities of the system and how they allow the robust emergence of solitary waves in our system.
 H. Bao, et al. Laser Cavity-Soliton Microcombs. Nat. Photonics 13, 384 (2019).
M. Rowley, et al., "Self-Emergence of Robust Micro Cavity-Solitons," https://www.researchsquare.com.
Bio: Prof. Alessia Pasquazi received her PhD in Engineering from the University of Roma Tre in 2009. She has been MELS fellow (Quebec, Canada) from 2010-2011 and EU Marie-Curie Fellow from 2013-2015, Ernest Rutherford Fellow (2018-2022), ERC Starting Grant Laureate (2020-2024). She works in the field of nonlinear photonics and microcombs. Alessia led the research in ultrafast integrated optics at the EPic Lab at the university of Sussex (2014-2022) and currently at Loughborough University in the Emergent Photonics Research Centr. She serves as member and chair of panels for several conferences, organised by SPIE, OPTICA and IEEE societies. She has been program chair of the OSA 'Nonlinear Photonics conference' (2018) and general chair of the OSA 'Nonlinear Photonics conference' (2020).
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