Thermally induced mode coupling in rare-earth doped fiber amplifiers

被引：126

作者：

Hansen, Kristian Rymann ^{[1
]}

Alkeskjold, Thomas Tanggaard ^{[2
]}

Broeng, Jes ^{[2
]}

Laegsgaard, Jesper ^{[1
]}

机构：

[1] Tech Univ Denmark, Dept Photon Engn, DK-2800 Lyngby, Denmark

[2] NKT Photon AS, DK-3460 Birkerod, Denmark

来源：

OPTICS LETTERS | 2012年 / 37卷 / 12期

关键词：

D O I：

10.1364/OL.37.002382

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We present a simple semianalytical model of thermally induced mode coupling in multimode rare-earth doped fiber amplifiers. The model predicts that power can be transferred from the fundamental mode to a higher-order mode when the operating power exceeds a certain threshold, and thus provides an explanation of recently reported mode instability in such fiber amplifiers under high average-power operation. We apply our model to a simple step-index fiber design, and investigate how the power threshold depends on various design parameters of the fiber. (C) 2012 Optical Society of America

引用

页码：2382 / 2384

页数：3

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