Transverse mode instability in a passive fiber induced by stimulated Raman scattering

被引：31
作者：
Distler, Victor [1 ,2 ]
Moeller, Friedrich [1 ]
Strecker, Maximilian [1 ]
Palma-Vega, Gonzalo [1 ,2 ]
Walbaum, Till [1 ]
Schreiber, Thomas [1 ]
机构：
[1] Fraunhofer Inst Appl Opt & Precis Engn, Albert Einstein Str 7, D-07745 Jena, Germany
[2] Friedrich Schiller Univ Jena, Inst Appl Phys, Albert Einstein Str 15, D-07745 Jena, Germany
来源：
OPTICS EXPRESS | 2020年 / 28卷 / 15期
关键词：
LASER; AMPLIFIER;
D O I：
10.1364/OE.398882
中图分类号：
O43 [光学];
学科分类号：
070207 ; 0803 ;
摘要：
Transverse mode instabilities are a major limitation for power scaling of fiber lasers but have so far only been observed in laser-active fibers. In this contribution we present experimental observations of transverse mode instabilities in a passive fiber. In this fiber, stimulated Raman scattering acted as heat source. To demonstrate the effect, a kW-level ytterbium-doped fiber laser was used as pump for a Raman amplifier. Transverse mode instabilities were only observed in the case with high Raman amplification. Frequency resolved stability measurements at various fiber positions as well as spectral and mode resolved measurements pin their origin to the passive fiber. This observation might help to gain further understanding of transverse mode instabilities and shows limitations of high-power Raman amplifiers. (C) 2020 Optical Society of America under the terms of the OSA Open Access Publishing Agreement
引用
收藏
页码：22819 / 22828
页数：10
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