Observation of cascade Brillouin processes in random distributed feedback Raman fiber lasers

A. E. Kirik; A. A. Aprelov; I. D. Vatnik; D. V. Churkin

doi:10.1117/12.2644093

3 January 2023 Observation of cascade Brillouin processes in random distributed feedback Raman fiber lasers

A. E. Kirik, A. A. Aprelov, I. D. Vatnik, D. V. Churkin

Proceedings Volume 12323, Quantum and Nonlinear Optics IX; 1232304 (2023) https://doi.org/10.1117/12.2644093
Event: SPIE/COS Photonics Asia, 2022, Online Only

Abstract

The optical feedback in random distributed feedback Raman fiber lasers is due to extremely weak Rayleigh backscattering, nevertheless it is capable of forming localized spectral modes at the generation threshold. Here we present experimental time-resolved observation of such ultra-narrow spectral modes, proving the presence of cascade Brillouin scattering during the generation. We realized a two-band optical heterodyning measurement system that allows studying the evolution of two arbitrary separated spectral regions with microsecond temporal and of-megahertz spectral resolution. Studying the occurrence rate for cascade Brillouin scattering, we found that it plays an important role in shaping the generation.

Conference Presentation

Citation Download Citation

A. E. Kirik, A. A. Aprelov, I. D. Vatnik, and D. V. Churkin "Observation of cascade Brillouin processes in random distributed feedback Raman fiber lasers", Proc. SPIE 12323, Quantum and Nonlinear Optics IX, 1232304 (3 January 2023); https://doi.org/10.1117/12.2644093

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