4.05kW monolithic narrow line-width near diffraction-limited fiber laser

Yun Luo; Ruoyu Liao; Yi Shi; Pengfei Zhao; Xianheng Yang; Sixin Wu; Dongyang Zou; Qihua Wang; Li'e Ouyang; Yunfeng You; Jing Wen; Jianjun Wang; Feng Jing

doi:10.1117/12.2586284

12 March 2021 4.05kW monolithic narrow line-width near diffraction-limited fiber laser

Yun Luo, Ruoyu Liao, Yi Shi, Pengfei Zhao, Xianheng Yang, Sixin Wu, Dongyang Zou, Qihua Wang, Li'e Ouyang, Yunfeng You, Jing Wen, Jianjun Wang, Feng Jing

Author Affiliations +

Proceedings Volume 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications; 117631I (2021) https://doi.org/10.1117/12.2586284
Event: Seventh Symposium on Novel Photoelectronic Detection Technology and Application 2020, 2020, Kunming, China

Abstract

The average power scaling of counter pumped Yb-doped monolithic fiber amplifiers emitting a diffraction-limited beam has been investigated. The characteristics of seed laser including linewidth and power are optimized, which are beneficial for the suppression of stimulated Brillouin scattering (SBS), nonlinear-induced spectral broadening and transverse mode instabilities (TMI). The fiber with a mode field area of 700 μm2 is able to amplify a 360 W narrow linewidth seed up to 4.05 kW average output power before the onset of TMI. Up to this power level, a narrow linewidth with (0.372 nm), high optical-to-optical efficiency of 67.6% with diffraction-limited beam quality and without any sign of TMI or stimulated Raman scattering for a spectral dynamic range of higher than -52 dB is obtained.

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Yun Luo, Ruoyu Liao, Yi Shi, Pengfei Zhao, Xianheng Yang, Sixin Wu, Dongyang Zou, Qihua Wang, Li'e Ouyang, Yunfeng You, Jing Wen, Jianjun Wang, and Feng Jing "4.05kW monolithic narrow line-width near diffraction-limited fiber laser", Proc. SPIE 11763, Seventh Symposium on Novel Photoelectronic Detection Technology and Applications, 117631I (12 March 2021); https://doi.org/10.1117/12.2586284

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