Role of cross-phase modulation with the pump wave for the narrow generation regime of a random fiber laser

O. A. Gorbunov; I. D. Vatnik; N. A. Makarova; D. V. Churkin

doi:10.1117/12.3036420

13 December 2024 Role of cross-phase modulation with the pump wave for the narrow generation regime of a random fiber laser

O. A. Gorbunov, I. D. Vatnik, N. A. Makarova, D. V. Churkin

Author Affiliations +

Proceedings Volume 13246, Quantum and Nonlinear Optics XI; 132461H (2024) https://doi.org/10.1117/12.3036420
Event: SPIE/COS Photonics Asia, 2024, Nantong, Jiangsu, China

Conference Poster

Abstract

In present paper we discuss the role of interaction between the pump and generation waves in a fiber laser with randomly distributed feedback due to weak Rayleigh backscattering, operating in the ultra-narrow regime, observed just above the generation threshold. Spectrum in this case consists of narrow (less than 1 MHz) modes, having typical lifetime of 1 ms, decomposing through the nonlinear interaction processes. We demonstrate that cross-phase modulation between narrow mode and the pump wave can lead to demolition of the first if the walk-off length is big enough. Therefore, ultra-narrow regime is dependent on fiber dispersion, as it defines the walk-off parameter of the fiber. Comparison with the experiment proves our conclusion: in random lasers, based on fibers with low dispersion, no narrow generation occurs, while for fibers with larger dispersion coefficient it is steadily observed.

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

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O. A. Gorbunov, I. D. Vatnik, N. A. Makarova, and D. V. Churkin "Role of cross-phase modulation with the pump wave for the narrow generation regime of a random fiber laser", Proc. SPIE 13246, Quantum and Nonlinear Optics XI, 132461H (13 December 2024); https://doi.org/10.1117/12.3036420

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