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短脉冲间隔脉冲组输出电光调Q Nd∶YAG激光器

Electro-Optic Q-Switched Nd∶YAG Laser with Short Pulse Interval and Pulse Group Output

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摘要

提出了一种短脉冲间隔、子脉冲峰值功率高的脉冲组输出电光调Q激光器。以激光二极管(LD)侧面抽运Nd∶YAG晶体,谐振腔单次储能,控制Q开关台阶式多次开启,将单次抽运能量分多次调Q输出,实现短脉冲间隔脉冲组激光输出,为高重复频率、高峰值功率激光器提供研究思路。实验结果表明,用一组半环形激光二极管模块作为工作物质Nd∶YAG的抽运源,铌酸锂(LN)晶体作为Q开关,激光二极管模块单次抽运工作物质储能,台阶式开启Q开关,激光器在1~20 Hz频率范围内能够稳定运行,得到子脉冲间隔最小为100 ns的脉冲组输出,子脉冲频率在1.1~10.0 MHz范围内可调,子脉冲能量大于23 mJ,能量波动小于10%,单个脉冲宽度小于37 ns,子脉冲峰值功率接近1 MW,光-光转换效率为22.5%。

Abstract

A kind of electro-optic Q-switched laser in the form of pulse group output with short pulse interval and high subpulse peak power is proposed. The Nd∶YAG crystal is pumped by the diode laser (LD) module, and the single energy storage of resonant cavity is achieved. On the basis of controlling the Q-switch steps open repeatedly, single pump energy can be divided into multiple times Q-switched outputs and the short pulse interval and pulse group laser output are obtained, providing a research way for high repetition frequency and high peak power laser. Results show that with a group of half ring laser diode module as the source for Nd∶YAG crystal, lithium niobate (LN) crystal as the Q-switch, storage material is single pumped by laser diode module, and the Q-switch is stepped opened, the laser can be stably operation in the range of 1-20 Hz, minimum subpulse interval of 100 ns is obtained and subpulse frequency ranges in 1.1-10.0 MHz, subpulse energy is greater than 23 mJ and energy fluctuation is less than 10%, single pulse width is less than 37 ns, subpulse peak power is close to 1 MW, and the optical-optical conversion efficiency is 22.5%.

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中图分类号:TN248.1

DOI:10.3788/cjl201845.0601001

所属栏目:激光器件与激光物理

收稿日期:2017-11-14

修改稿日期:2017-12-18

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连亚霄:长春理工大学理学院吉林省固体激光技术与应用重点实验室, 吉林 长春 130022
王超:长春理工大学理学院吉林省固体激光技术与应用重点实验室, 吉林 长春 130022
王頔:长春理工大学理学院吉林省固体激光技术与应用重点实验室, 吉林 长春 130022
段育盛:长春理工大学理学院吉林省固体激光技术与应用重点实验室, 吉林 长春 130022
郭俊文:长春理工大学理学院吉林省固体激光技术与应用重点实验室, 吉林 长春 130022
金光勇:长春理工大学理学院吉林省固体激光技术与应用重点实验室, 吉林 长春 130022

联系人作者:王超(105665608@qq.com)

备注:连亚霄(1989—),男,硕士研究生,主要从事半导体激光器物理与技术方面的研究。E-mail: 1945057326@qq.com

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引用该论文

Lian Yaxiao,Wang Chao,Wang Di,Duan Yusheng,Guo Junwen,Jin Guangyong. Electro-Optic Q-Switched Nd∶YAG Laser with Short Pulse Interval and Pulse Group Output[J]. Chinese Journal of Lasers, 2018, 45(6): 0601001

连亚霄,王超,王頔,段育盛,郭俊文,金光勇. 短脉冲间隔脉冲组输出电光调Q Nd∶YAG激光器[J]. 中国激光, 2018, 45(6): 0601001

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