The impact of modal interference on the beam quality of high-power fiber amplifiers

被引：184

作者：

Jauregui, Cesar ^{[1
]}

Eidam, Tino ^{[1
]}

Limpert, Jens ^{[1
]}

Tuennermann, Andreas ^{[1
,2
]}

机构：

[1] Univ Jena, Inst Appl Phys, D-07745 Jena, Germany

[2] Fraunhofer Inst Appl Opt & Precis Engn, D-07745 Jena, Germany

来源：

OPTICS EXPRESS | 2011年 / 19卷 / 04期

基金：

欧洲研究理事会;

关键词：

NONLINEARITY; LASERS;

D O I：

10.1364/OE.19.003258

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Recent work on high-power fiber amplifiers report on a degradation of the output beam quality or even on the appearance of mode instabilities. By combining the transversally resolved rate equations with a 3D Beam propagation method we have managed to create a model able to provide an explanation of what we believe is at the root of this effect. Even though this beam quality degradation is conventionally linked to transversal hole burning, our simulations show that this alone cannot explain the effect in very large mode area fibers. According to the model presented in this paper, the most likely cause for the beam quality degradation is an inversion-induced grating created by the interplay between modal interference along the fiber and transversal hole burning. (C)2011 Optical Society of America

引用

页码：3258 / 3271

页数：14

共 19 条

[1] Optically induced long-period fiber gratings for guided mode conversion in few-mode fibers [J].