Thermo-optical effects in high-power Ytterbium-doped fiber amplifiers

被引：76

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 EXPRESS | 2011年 / 19卷 / 24期

关键词：

OUTPUT POWER; BEAM QUALITY; OPERATION; LASERS;

D O I：

10.1364/OE.19.023965

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We investigate the effect of temperature gradients in high-power Yb-doped fiber amplifiers by a numerical beam propagation model, which takes thermal effects into account in a self-consistent way. The thermally induced change in the refractive index of the fiber leads to a thermal lensing effect, which decreases the effective mode area. Furthermore, it is demonstrated that the thermal lensing effect may lead to effective multi-mode behavior, even in single-mode designs, which could possibly lead to degradation of the output beam quality. (C) 2011 Optical Society of America

引用

页码：23965 / 23980

页数：16

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