Radially polarized and pulsed output from passively Q-switched Nd:YAG ceramic microchip laser

被引：45

作者：

Li, Jian-lang ^{[1
,2
]}

Ueda, Ken-ichi ^{[2
]}

Musha, Mitsuru ^{[2
]}

Zhong, Lan-xiang ^{[2
,3
]}

Shirakawa, Akira ^{[2
]}

机构：

[1] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China

[2] Univ Electrocommun, Inst Laser Sci, Tokyo 1828585, Japan

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

来源：

OPTICS LETTERS | 2008年 / 33卷 / 22期

关键词：

D O I：

10.1364/OL.33.002686

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

For the first time, to the best of our knowledge, a radially polarized laser pulse was produced from a passively Q-switched Nd:YAG ceramic microchip laser with a piece of Cr4+:YAG crystal as the saturable absorber and multilayer concentric subwavelength grating as the polarization-selective output coupler. The averaged laser power reached 450 mW with a slope efficiency of 30.2%. The laser pulse had a maximum peak power of 759 W, a minimum pulse duration of 86 ns, and a 6.7 kHz repetition rate at 3.7 W absorbed pump power. The polarization degree of the radially polarized pulse was measured to be as high as 97.4%. Such a radially polarized laser pulse with a high peak power and a short width is important to numerous applications such as metal cutting. (C) 2008 Optical Society of America

引用

页码：2686 / 2688

页数：3

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