Design and optimization methods towards a 10 kW high beam quality fiber laser based on the counter tandem pumping scheme

Ruixian Li; Hanshuo Wu; Hu Xiao; Zilun Chen; Jinyong Leng; Liangjin Huang; Zhiyong Pan; Pu Zhou

doi:10.1017/hpl.2024.21

High Power Laser Science and Engineering (Jan 2024)

Design and optimization methods towards a 10 kW high beam quality fiber laser based on the counter tandem pumping scheme

Ruixian Li,
Hanshuo Wu,
Hu Xiao,
Zilun Chen,
Jinyong Leng,
Liangjin Huang,
Zhiyong Pan,
Pu Zhou

Affiliations

Ruixian Li: ORCiD; College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China
Hanshuo Wu: ORCiD; College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, China
Hu Xiao: College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, China
Zilun Chen: College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, China
Jinyong Leng: College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, China
Liangjin Huang: College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, China
Zhiyong Pan: College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China Nanhu Laser Laboratory, National University of Defense Technology, Changsha, China Hunan Provincial Key Laboratory of High Energy Laser Technology, Changsha, China
Pu Zhou: ORCiD; College of Advanced Interdisciplinary Studies, National University of Defense Technology, Changsha, China

DOI: https://doi.org/10.1017/hpl.2024.21
Journal volume & issue: Vol. 12

Abstract

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In this study, we investigated the influence of fiber parameters on stimulated Raman scattering (SRS) and identified a unique pattern of SRS evolution in the counter tandem pumping configuration. Our findings revealed that the SRS threshold in counter-pumping is predominantly determined by the length of the output delivery fiber rather than the gain fiber. By employing the counter tandem pumping scheme and optimizing the fiber parameters, a 10 kW fiber laser was achieved with beam quality M2 of 1.92. No mode instability or severe SRS limitation was observed. To our knowledge, this study achieved the highest beam quality in over 10 kW fiber lasers based on conventional double-clad Yb-doped fiber.

Published in High Power Laser Science and Engineering

ISSN: 2095-4719 (Print); 2052-3289 (Online)
Publisher: Cambridge University Press
Country of publisher: United Kingdom
LCC subjects: Technology: Engineering (General). Civil engineering (General): Applied optics. Photonics
Website: https://www.cambridge.org/core/journals/high-power-laser-science-and-engineering

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