39-mW annular excitation of ytterbiurn fiber laser with radial polarization

被引：28

作者：

Li, J. -L. ^{[1
]}

Ueda, K. -I.

Shirakawa, A.

Musha, M.

Zhong, L. -X.

Zhang, Z. -M.

机构：

[1] Univ Electro Commun, Inst Laser Sci, Tokyo 1828585, Japan

[2] NW Univ Xian, Dept Elect Sci, Xian 710069, Peoples R China

[3] S China Normal Univ, Lab Photon Informat Technol, Guangzhou 510006, Peoples R China

来源：

LASER PHYSICS LETTERS | 2007年 / 4卷 / 11期

关键词：

radially polarized; fiber laser; annular excitation;

D O I：

10.1002/lapl.200710066

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

An efficient radial-polarization Yb-fiber laser with an intracavity Brewster axicon is demonstrated. The fraction of ASE at low pumping and parasitical oscillation are minimized by adopting bidirectional pumping and angle-polisbed fiber end. So far, except for the improvement in polarization purity and cylindrical symmetry of output beam, 39-mW output power is obtained at 460-mW launched pump power with 13.8% slope efficiency. And also a new type of low-V-parameter multi-mode gain fiber with doughnut concentration distribution of active ions in fiber core profile is predicted to be promising in improving the laser performance further.

引用

页码：814 / 818

页数：5

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