Laminar-turbulent transition in Raman fiber lasers:a first passage statistics based analysis

Chattopadhyay, Amit K, Nasiev, Diar, Sugavanam, Srikanth, Tarasov, Nikita and Churkin, Dmitry V. (2016). Laminar-turbulent transition in Raman fiber lasers:a first passage statistics based analysis. Scientific Reports, 6 ,

Abstract

Loss of coherence with increasing excitation amplitudes and spatial size modulation is a fundamental problem in designing Raman fiber lasers. While it is known that ramping up laser pump power increases the amplitude of stochastic excitations, such higher energy inputs can also lead to a transition from a linearly stable coherent laminar regime to a non-desirable disordered turbulent state. This report presents a new statistical methodology, based on first passage statistics, that classifies lasing regimes in Raman fiber lasers, thereby leading to a fast and highly accurate identification of a strong instability leading to a laminar-turbulent phase transition through a self-consistently defined order parameter. The results have been consistent across a wide range of pump power values, heralding a breakthrough in the non-invasive analysis of fiber laser dynamics.

Publication DOI: https://doi.org/10.1038/srep28492
Dataset DOI: https://doi.org/10.17036/3e253d2a-501e-4258-ade4-3f35677af718
Divisions: Engineering & Applied Sciences > Mathematics
Engineering & Applied Sciences > Systems analytics research institute (SARI)
Engineering & Applied Sciences
Engineering & Applied Sciences > Electrical, Electronic & Power Engineering
Engineering & Applied Sciences > Aston Institute of Photonics Technology
Additional Information: This work is licensed under a Creative Commons Attribution 4.0 International License. The images or other third party material in this article are included in the article’s Creative Commons license, unless indicated otherwise in the credit line; if the material is not included under the Creative Commons license, users will need to obtain permission from the license holder to reproduce the material. To view a copy of this license, visit http://creativecommons.org/licenses/by/4.0/ Funding: ERC (grant 267763 “Ultralaser”); H2020 project CARDIALLY; and Russian Ministry of Science and Education (14.584.21.0014). Data related to Figures 2–4 can be accessed from the following doi: http://dx.doi.org/10.17036/3e253d2a-501e-4258-ade4-3f35677af718.
Uncontrolled Keywords: nonlinear optics,nonlinear phenomena,phase transitions and critical phenomena,General
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Related URLs: http://www.scop ... tnerID=8YFLogxK (Scopus URL)
Published Date: 2016-06-28
Authors: Chattopadhyay, Amit K ( 0000-0001-5499-6008)
Nasiev, Diar
Sugavanam, Srikanth
Tarasov, Nikita ( 0000-0002-0583-8449)
Churkin, Dmitry V.

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