2kW narrow linewidth all fiber laser

Liming Zhang; Kun Zhang; Hong Zhao; Kuiyan Song; Rufeng Sun; Yitao Fang; Chen Zhu; Dayong Zhang; Nianjiang Chen; Shouhuan Zhou

doi:10.1117/12.2587636

2 December 2020 2kW narrow linewidth all fiber laser

Liming Zhang, Kun Zhang, Hong Zhao, Kuiyan Song, Rufeng Sun, Yitao Fang, Chen Zhu, Dayong Zhang, Nianjiang Chen, Shouhuan Zhou

Author Affiliations +

Proceedings Volume 11717, 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics; 117173H (2020) https://doi.org/10.1117/12.2587636
Event: 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, 2020, Shanghai, China

Abstract

Recently, narrow linewidth fiber lasers are wide applied in coherent detection and wavelength beam combining. The influence of fiber grating oscillating longitudinal mode distribution and the amplifier gain fiber characteristics on the output laser spectrum width are explored. The influence of the optical field distribution and the spatial hole burning effect on oscillating longitudinal modes number is analyzed. And the influence of four-wave mixing effect (FWM) in the amplified laser on the spectral width of the output laser is analyzed. The main oscillation power amplification technology of one-stage oscillation and one-stage amplification is used. Finally, the influence of the reflection bandwidth of the resonant cavity, the longitudinal mode number of the main oscillation stage and the length and core diameter of the gain fiber of the amplifier stage on the output laser spectrum width is studied. Spectral width of 0.29nm, power of 2kW and center wavelength of 1064.4nm is realized. The beam quality is M_x²=1.2，M_y²=1.3.

Citation Download Citation

Liming Zhang, Kun Zhang, Hong Zhao, Kuiyan Song, Rufeng Sun, Yitao Fang, Chen Zhu, Dayong Zhang, Nianjiang Chen, and Shouhuan Zhou "2kW narrow linewidth all fiber laser", Proc. SPIE 11717, 24th National Laser Conference & Fifteenth National Conference on Laser Technology and Optoelectronics, 117173H (2 December 2020); https://doi.org/10.1117/12.2587636

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