Radially Polarized and Passively Q-Switched Nd: YAG Laser Under Annular-Shaped Pumping

被引：31
|
作者：
Fang, Zhiqiang [1 ]
Xia, Kegui [1 ]
Yao, Yao [1 ]
Li, Jianlang [1 ]
机构：
[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China
来源：
IEEE JOURNAL OF SELECTED TOPICS IN QUANTUM ELECTRONICS | 2015年 / 21卷 / 01期
关键词：
Beam reshaping; passively Q-switched laser; step-index fiber; thermaloptic effects; vector laser beam; GENERATION;
D O I：
10.1109/JSTQE.2014.2325216
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 reported, for the first time, a radially polarized and passively Q-switched Nd: YAG laser with annular-shaped pumping. The annular intensity profile of the pump light was originated from the mode conversion in a conventional multi-mode fiber under off-focus coupling. Radially polarized pulse from this laser had 3.3 kW peak power, 39 ns duration at 2.5-kHz repetition rate with similar to 90% degree of polarization. When the laser crystal was slightly tilted, the polarization state of laser beam was switched to azimuthal polarization at high pump power, while remained radial polarization at lower pump power.
引用
收藏
页码：337 / 342
页数：6
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