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 journalArticlepeer-review


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 languageEnglish
Article number28492
Number of pages5
JournalScientific Reports
Early online date28 Jun 2016
Publication statusPublished - 28 Jun 2016

Bibliographical note

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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:


  • nonlinear optics
  • nonlinear phenomena
  • phase transitions and critical phenomena


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