Influence of cross-sectional shape on absorption characteristics of double-clad fiber lasers

被引：11

作者：

Xu, JQ ^{[1
]}

Lu, JH

Lu, JR

Ueda, K

机构：

[1] Heriot Watt Univ, Sch Engn & Phys Sci, Dept Phys, Edinburgh EH11 4AS, Midlothian, Scotland

[2] Univ Electrocommun, Inst Laser Sci, Tokyo 182, Japan

来源：

OPTICAL ENGINEERING | 2003年 / 42卷 / 09期

关键词：

fiber laser; double-cladding fiber; absorption; mode coupling;

D O I：

10.1117/1.1593662

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

The influence of the cross-sectional shape of the inner cladding on the absorption characteristics of double-clad fiber lasers has been investigated by wave coupling theory. Wave equations are solved taking into account mode coupling effects between eigenmodes. The coupling between eigenmodes arises from the nonuniform absorption in the doped core region and leads to nonexponential absorption of the pump power. A characteristic parameter is proposed to compare the absorption characteristics among various cross-sectional shapes of double-clad fibers. It is found that a triangular cross section has the best absorption characteristics among the cross-sectional shapes examined. (C) 2003 Society of Photo-Optical Instrumentation Engineers.

引用

页码：2527 / 2533

页数：7

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