Impact of mode instability on polarization extinction ratio in backward pumped fiber amplifiers

Qiuhui Chu; Chun Zhang; Qiang Shu; Chao Guo; Haoyu Zhang; Rumao Tao; Honghuan Lin

doi:10.1117/12.3008002

18 December 2023 Impact of mode instability on polarization extinction ratio in backward pumped fiber amplifiers

Qiuhui Chu, Chun Zhang, Qiang Shu, Chao Guo, Haoyu Zhang, Rumao Tao, Honghuan Lin

Proceedings Volume 12959, AOPC 2023: Laser Technology and Applications; and Optoelectronic Devices and Integration; 1295918 (2023) https://doi.org/10.1117/12.3008002
Event: Applied Optics and Photonics China 2023 (AOPC2023), 2023, Beijing, China

Abstract

The influence of mode instability (MI) on polarization extinction ratio (PER) has been investigated in a 2 kW level polarization-maintained (PM) fiber laser system with backward-pumped configuration, and the phenomena is different from the existing observation in forward-pumped PM fiber amplifiers. During the experiment, with the onset of MI, none decrease of PER has been observed, revealing that the MI effect has little impact on PER in backward PM fiber amplifiers. The discrepancy induced by the pump configuration has been theoretically analyzed, and the origin is attributed to the longitudinally-distribution difference of high order mode induced by the MI effect.

(2023) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

Qiuhui Chu, Chun Zhang, Qiang Shu, Chao Guo, Haoyu Zhang, Rumao Tao, and Honghuan Lin "Impact of mode instability on polarization extinction ratio in backward pumped fiber amplifiers", Proc. SPIE 12959, AOPC 2023: Laser Technology and Applications; and Optoelectronic Devices and Integration, 1295918 (18 December 2023); https://doi.org/10.1117/12.3008002

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