Numerical Optimisation of Pump Absorption in Doped Double-Clad Fiber with Transverse and Longitudinal Perturbation

被引：9

作者：

Codemard, Christophe A. ^{[1
]}

Malinowski, Andy ^{[1
]}

Zervas, Michalis N. ^{[1
,2
]}

机构：

[1] SPI Lasers UK Ltd, Adv Laser Lab, Southampton SO30 2QU, Hants, England

[2] Univ Southampton, Optoelect Res Ctr, Southampton SO17 1BJ, Hants, England

来源：

FIBER LASERS XIV: TECHNOLOGY AND SYSTEMS | 2017年 / 10083卷

关键词：

Beam propagation method; double-clad optical fibers; fiber amplifiers; fiber lasers; superformula;

D O I：

10.1117/12.2252091

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We report on the impact of the cross-sectional shape of the inner cladding of double-clad fiber on pump absorption using a Beam Propagation Method based on azimuthal harmonics expansions and the so-called "superformula" to describe complex shapes. The impact of shaped cladding and of the fiber layout on pump absorption of double-clad fiber is studied. We observe that for nearly circular cross-section fibers the pump absorption can be enhanced to match that of fiber with strong azimuthal asymmetry, through optimised fiber layout that maximizes pump mixing.

引用

页数：7

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