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

Amit K Chattopadhyay; Diar Nasiev; Srikanth Sugavanam; Nikita Tarasov; Dmitry V. Churkin

doi:10.1038/srep28492

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

Amit K Chattopadhyay^*, Diar Nasiev, Srikanth Sugavanam, Nikita Tarasov, Dmitry V. Churkin

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

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.

Original language	English
Article number	28492
Number of pages	5
Journal	Scientific Reports
Volume	6
Early online date	28 Jun 2016
DOIs	https://doi.org/10.1038/srep28492
Publication status	Published - 28 Jun 2016

Bibliographical note

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.

Keywords

nonlinear optics
nonlinear phenomena
phase transitions and critical phenomena

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10.1038/srep28492Licence: CC BY

Laminar-turbulent transition in Raman fiber lasers
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/
Final published version, 414 KBLicence: CC BY

Cite this

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title = "Laminar-turbulent transition in Raman fiber lasers: a first passage statistics based analysis",

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.",

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AU - Churkin, Dmitry V.

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AB - 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.

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

Abstract

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Keywords

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