The influence of index-depressions in core-pumped Yb-doped large pitch fibers

被引：84

作者：

Jansen, Florian ^{[1
]}

Stutzki, Fabian ^{[1
]}

Otto, Hans-Juergen ^{[1
]}

Baumgartl, Martin ^{[1
]}

Jauregui, Cesar ^{[1
]}

Limpert, Jens ^{[1
]}

Tuennermann, Andreas ^{[2
]}

机构：

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

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

来源：

OPTICS EXPRESS | 2010年 / 18卷 / 26期

基金：

欧洲研究理事会;

关键词：

PHOTONIC-CRYSTAL FIBERS; OPTICAL-FIBERS; BEAM QUALITY; MODE-OPERATION; AREA; PROPAGATION; AMPLIFIERS; LASERS;

D O I：

10.1364/OE.18.026834

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

Rare-earth doped photonic crystal fibers rely ideally on an index matching of the doped core to the surrounding glass to work properly. Obtaining a perfect index matching is technologically very challenging, and fiber manufacturers opt for targeting an index depression instead, which still ensures the influence of the photonic structure on the light propagation. In this paper the analysis of the influence of this core index depression on the higher-order mode discrimination and on the beam quality of the fundamental mode of different designs of core-pumped active large pitch photonic crystal fibers is discussed. The most promising design is evaluated in terms of mode area scaling with a view to mode field diameters above 100 mu m. Detailed requirements on the accuracy of the core index matching are deduced. (C)2010 Optical Society of America

引用

页码：26834 / 26842

页数：9

共 18 条

[1] Spatial dopant profiles for transverse-mode selection in multimode waveguides [J].