Spatial location of correlations in a random distributed feedback Raman fiber laser

I. D. Vatnik*, O. A. Gorbunov, S. Sugavanam, D. V. Churkin, E. V. Podivilov

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


Nonlinear interactions between different components of multiwavelength radiation are one of the main processes shaping properties of quasi-CW fiber lasers. In random fiber lasers, nonlinear influence may be more complicated, as there are no distinct longitudinal modes in radiation because of the random nature of the feedback. In this Letter, we experimentally characterize internal correlations in the radiation of a multiwavelength random distributed feedback fiber laser. An analysis of Pearson correlation functions allows us to spatially locate the area over the fiber laser length in which correlations are more likely to occur. This, in turn, leads us to the conclusion about the main mechanism of spectral correlations—the relative intensity noise transfer from the pump wave.

Original languageEnglish
Pages (from-to)1516-1519
Number of pages4
JournalOptics Letters
Issue number6
Early online date14 Feb 2019
Publication statusPublished - 15 Mar 2019

Bibliographical note

This paper was published in Optics Letters and is made available as an electronic reprint with the permission of OSA. The paper can be found at the following URL on the OSA website: Systematic or multiple reproduction or distribution to multiple locations via electronic or other means is prohibited and is subject to penalties under law.


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