3.7 kW monolithic narrow linewidth single mode fiber laser through simultaneously suppressing nonlinear effects and mode instability

被引：84
作者：
Lin, H. [1 ,2 ]
Tao, R. [2 ]
Li, C. [2 ]
Wang, B. [2 ]
Guo, C. [2 ]
Shu, Q. [2 ]
Zhao, P. [2 ]
Xu, L. [1 ]
Wang, J. [2 ]
Jing, F. [2 ]
Chu, Q. [2 ,3 ]
机构：
[1] Univ Sci & Technol China, Dept Opt & Opt Engn, Hefei 230026, Anhui, Peoples R China
[2] China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621900, Peoples R China
[3] Tsinghua Univ, Dept Engn Phys, Accelerator Lab, Beijing 100084, Peoples R China
来源：
OPTICS EXPRESS | 2019年 / 27卷 / 07期
关键词：
HIGH-POWER; AVERAGE POWER; SCATTERING; AMPLIFIERS; ORIGIN;
D O I：
10.1364/OE.27.009716
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
In this paper, we report a 3.7 kW all fiber narrow linewidth single mode fiber laser. The full width at half-maximum is about 0.30 nm, and the beam quality is M-x(2)=1.358, M-y(2)=1.202 at maximum output power. The laser is achieved by simultaneously suppressing nonlinear effects and mode instability (MI). Different seeds are injected into the main amplifier to study stimulated Raman scattering (SRS) effect. The results show that the phase modulated single frequency seed is benefit to suppress the SRS effect. For the phase modulated single frequency seed, inserting a filter in preamplifier will suppress amplified spontaneous emission (ASE) and decrease the backward power. By optimizing the coiling of active fiber, the MI effect is suppressed. (C) 2019 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：9716 / 9724
页数：9
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