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基于圆环达曼光栅整形的环形光抽运的Nd:YAG声光调Q涡旋光激光器

Acousto-Optically Q-Switched and Vortex Nd:YAG Laser by Using Circular Dammann Grating for Annular Pumping

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摘要

研究了圆环达曼光栅(CDG)整形的环形光抽运的声光调Q Nd:YAG激光器。该激光器的腔体由激光晶体、声光调制器以及平面输出耦合镜组成。所用抽运源为光纤耦合808 nm半导体激光器,其发射光经过CDG发生一级衍射,产生的环形光场强度分布用于端面抽运Nd:YAG激光晶体。实验获得了高光束质量、线偏振、且具有螺旋相位的主动调Q脉冲光输出。当吸收抽运功率为5.6 W、声光调制器工作频率为5 kHz时,激光脉冲的平均功率为470 mW,峰值功率达到588 W,脉冲宽度为160 ns。

Abstract

An acousto-optically Q-switched vortex Nd:YAG laser by annular pumping of circular Dammann grating (CDG) shaping is investigated. The cavity of the laser is composed of a laser crystal, an acousto-optical modulator and a planar output coupling mirror. The pump source is a fiber coupling semiconductor laser of 808 nm. The annular intensity distribution of pump light is formed by the first-order diffraction of a CDG with high diffraction efficiency, which is used to end pumped Nd:YAG laser crystal. The octive Q-swith pulse laser is obtained with high optical quality, linear polarization and spiral phase. The obtained power of laser pulse is 470 mW, the peak power of laser pulse reaches 588 W and pulse width is 160 ns, when the absorbed pump power is 5.6 W and the frequency of acousto-optical modulator is 5 kHz.

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中图分类号:TN248.1

DOI:10.3788/cjl201643.0601002

所属栏目:激光器件与激光物理

基金项目:国家自然科学基(61275206 ,61475166)

收稿日期:2016-01-12

修改稿日期:2016-02-24

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作者单位    点击查看

徐云:中国科学院上海光学精密机械研究所, 上海 201800
余俊杰:中国科学院上海光学精密机械研究所, 上海 201800
韩侠辉:中国科学院上海光学精密机械研究所, 上海 201800
李桂运:中国科学院上海光学精密机械研究所, 上海 201800
夏克贵:中国科学院上海光学精密机械研究所, 上海 201800
周常河:中国科学院上海光学精密机械研究所, 上海 201800
李建郎:中国科学院上海光学精密机械研究所, 上海 201800

联系人作者:徐云(xuyunlife@163.com)

备注:徐云(1991-),女,硕士研究生,主要从事固体激光器方面的研究。

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引用该论文

Xu Yun,Yu Junjie,Han Xiahui,Li Guiyun,Xia Kegui,Zhou Changhe,Li Jianlang. Acousto-Optically Q-Switched and Vortex Nd:YAG Laser by Using Circular Dammann Grating for Annular Pumping[J]. Chinese Journal of Lasers, 2016, 43(6): 0601002

徐云,余俊杰,韩侠辉,李桂运,夏克贵,周常河,李建郎. 基于圆环达曼光栅整形的环形光抽运的Nd:YAG声光调Q涡旋光激光器[J]. 中国激光, 2016, 43(6): 0601002

被引情况

【1】柯熙政,葛 甜. 利用少模光纤产生涡旋光的实验. 中国激光, 2017, 44(11): 1106004--1

【2】李剑伟,郑义,李祚涵,高亦飞,李庆玲. 基于Nd∶GdVO4晶体的自锁模皮秒涡旋光. 激光与光电子学进展, 2018, 55(2): 21411--1

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