High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

Yuxuan Liu; Chengjie Zhu; Yuxiang Sun; Richard P. Mildren; Zhenxu Bai; Baitao Zhang; Weibiao Chen; Dijun Chen; Muye Li; Xuezong Yang; Yan Feng

doi:10.1017/hpl.2023.67

High Power Laser Science and Engineering (Jan 2023)

High-power free-running single-longitudinal-mode diamond Raman laser enabled by suppressing parasitic stimulated Brillouin scattering

Yuxuan Liu,
Chengjie Zhu,
Yuxiang Sun,
Richard P. Mildren,
Zhenxu Bai,
Baitao Zhang,
Weibiao Chen,
Dijun Chen,
Muye Li,
Xuezong Yang,
Yan Feng

Affiliations

Yuxuan Liu: ORCiD; Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China
Chengjie Zhu: Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China
Yuxiang Sun: ORCiD; Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China
Richard P. Mildren: MQ Photonics Research Centre, School of Mathematical and Physical Sciences, Macquarie University, Sydney, Australia
Zhenxu Bai: Center for Advanced Laser Technology, Hebei University of Technology, Tianjin, China
Baitao Zhang: State Key Laboratory of Crystal Materials, Shandong University, Jinan, China
Weibiao Chen: Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China
Dijun Chen: Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China
Muye Li: Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China
Xuezong Yang: ORCiD; Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China State Key Laboratory of Crystal Materials, Shandong University, Jinan, China
Yan Feng: Hangzhou Institute for Advanced Study, University of Chinese Academy of Sciences, Hangzhou, China Shanghai Institute of Optics and Fine Mechanics, Chinese Academy of Sciences, Shanghai, China

DOI: https://doi.org/10.1017/hpl.2023.67
Journal volume & issue: Vol. 11

Abstract

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A continuous-wave (CW) single-longitudinal-mode (SLM) Raman laser at 1240 nm with power of up to 20.6 W was demonstrated in a free-running diamond Raman oscillator without any axial-mode selection elements. The SLM operation was achieved due to the spatial-hole-burning free nature of Raman gain and was maintained at the highest available pump power by suppressing the parasitic stimulated Brillouin scattering (SBS). A folded-cavity design was employed for reducing the perturbing effect of resonances at the pump frequency. At a pump power of 69 W, the maximum Stokes output reached 20.6 W, corresponding to a 30% optical-to-optical conversion efficiency from 1064 to 1240 nm. The result shows that parasitic SBS is the main physical process disturbing the SLM operation of Raman oscillator at higher power. In addition, for the first time, the spectral linewidth of a CW SLM diamond Raman laser was resolved using the long-delayed self-heterodyne interferometric method, which is 105 kHz at 20 W.

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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