Impact of Stimulated Raman Scattering on the Transverse Mode Instability Threshold

被引：31
作者：
Li, Zebiao [1 ,2 ,3 ]
Li, Chengyu [3 ]
Liu, Yu [3 ]
Luo, Qiang [3 ]
Lin, Honghuan [3 ]
Huang, Zhihua [3 ]
Xu, Shanhui [1 ,2 ]
Yang, Zhongmin [1 ,2 ]
Wang, Jianjun [3 ]
Jing, Feng [3 ]
机构：
[1] South China Univ Technol, State Key Lab Luminescent Mat & Devices, Guangzhou 510640, Guangdong, Peoples R China
[2] South China Univ Technol, Inst Opt Commun Mat, Guangzhou 510640, Guangdong, Peoples R China
[3] China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621900, Peoples R China
来源：
IEEE PHOTONICS JOURNAL | 2018年 / 10卷 / 03期
基金：
美国国家科学基金会;
关键词：
Transverse mode instability; stimulated Raman effect; fiber laser; POWER FIBER AMPLIFIERS; LASERS; OSCILLATORS; DEGRADATION;
D O I：
10.1109/JPHOT.2018.2842467
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
Quantum defect originating from the stimulated Raman scattering (SRS) effect is a heat source that induces refractive index grating and, thus, significantly decreases the threshold of transverse mode instability (TMI), which is the main limiting factor for the power scaling of high-power fiber lasers. A semi-analytical model that takes the TMI and SRS effects into account was developed, and the impact of the Raman content variation due to changes in the injected seed and fiber length on the TMI threshold was investigated. Experimental demonstrations of the impact of the SRS effect on the TMI threshold are presented. We proved that TMI affects the beam quality of the signal light rather than the Raman light. Taking these facts into account, the suppression of SRS could be an effective way to counter the TMI of fiber lasers.
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页数：9
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