Thermally induced waveguide changes in active fibers

被引：104

作者：

Jansen, Florian ^{[1
]}

Stutzki, Fabian ^{[1
]}

Otto, Hans-Juergen ^{[1
]}

Eidam, Tino ^{[1
,2
]}

Liem, Andreas ^{[1
,2
]}

Jauregui, Cesar ^{[1
]}

Limpert, Jens ^{[1
,2
]}

Tuennermann, Andreas ^{[1
,2
,3
]}

机构：

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

[2] Helmholtz Inst Jena, D-07743 Jena, Germany

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

来源：

OPTICS EXPRESS | 2012年 / 20卷 / 04期

基金：

欧洲研究理事会;

关键词：

HIGH AVERAGE POWER; PHOTONIC CRYSTAL FIBERS; YTTERBIUM-DOPED FIBER; OPTICAL-FIBERS; EFFECTIVE AREA; MODE; AMPLIFIERS; LASERS; OPERATION;

D O I：

10.1364/OE.20.003997

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Thermally induced waveguide changes become significant for very large mode area fibers. This results in a reduction of the mode-field diameter, but simultaneously in an improvement of the beam quality. In this work the first systematic experimental characterization of the reduction of the mode-field diameter in various fibers during high-power operation is carried out. It is shown that the reduction of the mode-field diameter shows a characteristic behavior that scales with the core size but that is independent of the particular fiber design. Furthermore, the strength of the actual index change is experimentally estimated, and its use to overcome avoided crossings is discussed and experimentally demonstrated. (C) 2012 Optical Society of America

引用

页码：3997 / 4008

页数：12

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