Measuring thermal load in fiber amplifiers in the presence of transversal mode instabilities

被引：25

作者：

Beier, Franz ^{[1
,2
]}

Ploetner, Marco ^{[1
]}

Sattler, Bettina ^{[1
]}

Stutzki, Fabian ^{[1
]}

Walbaum, Till ^{[1
]}

Liem, Andreas ^{[1
]}

Haarlammert, Nicoletta ^{[1
]}

Schreiber, Thomas ^{[1
]}

Eberhardt, Ramona ^{[1
]}

Tuennermann, Andreas ^{[1
,2
]}

机构：

[1] Fraunhofer Inst Appl Opt & Precis Engn, Albert Einstein Str 7, D-07745 Jena, Germany

[2] Friedrich Schiller Univ Jena, Abbe Ctr Photon, Inst Appl Phys, Albert Einstein Str 15, D-07745 Jena, Germany

来源：

OPTICS LETTERS | 2017年 / 42卷 / 21期

关键词：

AVERAGE POWER; THRESHOLD; LASERS; ORIGIN;

D O I：

10.1364/OL.42.004311

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We report on detailed in situ distributed temperature measurements inside a high power fiber amplifier. The deducted thermal load and the transversal mode instability (TMI) threshold of a commercial large mode area fiber with 25 mu m core and 400 mu m cladding were measured at various seed wavelengths. By matching these results with detailed simulations we show that photodarkening has a negligible impact on the thermal load and, therefore, on the TMI threshold in this fiber. (C) 2017 Optical Society of America

引用

页码：4311 / 4314

页数：4

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