Impact of bend-induced mode distortion on mode instability in high power fiber amplifiers

被引：2

作者：

Chu, Qiuhui ^{[1
,2
]}

Tao, Rumao ^{[1
]}

Lin, Honghuan ^{[1
]}

Wang, Jianjun ^{[1
]}

Jing, Feng ^{[1
]}

机构：

[1] China Acad Engn Phys, Res Ctr Laser Fus, Mianyang 621900, Sichuan, Peoples R China

[2] Tsinghua Univ, Dept Engn Phys, Minist Educ, Key Lab Particle & Radiat Imaging, Beijing 10084, Peoples R China

来源：

SIXTH SYMPOSIUM ON NOVEL OPTOELECTRONIC DETECTION TECHNOLOGY AND APPLICATIONS | 2020年 / 11455卷

关键词：

Fiber amplifier; Mode distortion; Mode instability; THEORETICAL-ANALYSIS; LOSS FORMULA; DOPED FIBER; THRESHOLD; AREA; COMPETITION; LASERS; CORE;

D O I：

10.1117/12.2564812

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

In this paper, the model to simulate the impact of bend induced mode distortion on the beam quality and mode instability (MI) threshold of fiber amplifier is established, and the results show that the bend induced mode distortion will degrade the beam quality of fiber laser and decrease the MI threshold. The bend induced mode distortion will change the gain of active fiber, then destroy the beam quality of fiber amplifier, and decrease the MI threshold, but the bend loss will suppress high order mode. Therefore, with the decreasing of fiber bend radius, the MI threshold will decrease firstly, and then increase.

引用

页数：7

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