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3.2 ns高峰值功率YAG/Nd∶YAG/Cr4+∶YAG键合晶体被动调Q径向偏振微片激光器

3.2 ns High Peak Power Radially Polarized Pulsed Output from Passively Q-Switched Microchip Laser with Composite Structure of YAG/Nd∶YAG/Cr4+∶YAG Crystal

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摘要

实验利用YAG/Nd∶YAG/Cr4+∶YAG 键合晶体和光子晶体光栅镜获得高峰值功率和高光束质量的被动调Q径向脉冲激光输出,激光器的输出功率达到435 mW,斜率效率为14.7%。在吸收抽运功率为6.8 W 时,输出激光脉冲的峰值功率达到15.7 kW,脉冲能量达到50.1 mJ,脉冲宽度为3.2 ns,重复频率为8.1 kHz,径向偏振纯度为95.8%。实验中的晶体均采用<111>的切割方向,输出径向偏振光束的均匀性得到提高。

Abstract

High peak power radially polarized laser pulse is obtained from a passively Q-switched microchip laser with composite structure of YAG/Nd∶YAG/Cr4 +∶YAG crystal and photonic crystal grating mirror as the polarization-selective output coupler. The average output power is 435 mW and a slope efficiency is 15.7%. The laser pulse output has a maximum peak power of 15.7 kW, a minimum pulse duration of 3.2 ns, and repetition rate of 8.1 kHz at absorbed pump power of 6.5 W. The polarization degree of the radially polarized pulse is measured to be as high as 95.8% . All of the crystals in the experiment are <111> cut which is more beneficial for this laser to improve the uniformity of output radially polarized beam.

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中图分类号:TN248.1

DOI:10.3788/cjl201542.0702010

所属栏目:激光物理

责任编辑:张雁  信息反馈

基金项目:国家自然科学基金(61275206,61475166)、青年自然科学基金(61405226)、上海市青年自然科学基金(14ZR1445200)

收稿日期:2015-02-02

修改稿日期:2015-03-18

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作者单位    点击查看

韩侠辉: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
李桂运: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:韩侠辉(hxiahui@163.com)

备注:韩侠辉(1987—),男,博士研究生,主要从事新型固体激光器方面的研究。

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引用该论文

Han Xiahui,Xia Kegui,Li Guiyun,Li Jianlang. 3.2 ns High Peak Power Radially Polarized Pulsed Output from Passively Q-Switched Microchip Laser with Composite Structure of YAG/Nd∶YAG/Cr4+∶YAG Crystal[J]. Chinese Journal of Lasers, 2015, 42(7): 0702010

韩侠辉,夏克贵,李桂运,李建郎. 3.2 ns高峰值功率YAG/Nd∶YAG/Cr4+∶YAG键合晶体被动调Q径向偏振微片激光器[J]. 中国激光, 2015, 42(7): 0702010

被引情况

【1】任俊杰,高小强,陈 檬. 千赫兹亚纳秒径向偏振光. 激光与光电子学进展, 2017, 54(11): 111403--1

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