二极管泵浦折叠式电光调Q激光器

针对机载激光测距及激光指示应用需求, 设计了一种紧凑可靠的电光调Q脉冲激光器。从调Q速率方程出发, 分析了激光器输出能量随优化参数z增大而增大、脉宽随z增大而减小的关系。采用6 mm×56 mm的Nd∶YAG激光晶体, LD侧面泵浦, 角锥棱镜作为折光器的u形折叠式非稳腔, 在增益满足的前提下, 提高谐振腔抗失调能力。在注入电脉冲1.2 J 条件下, 激光器单脉冲能量输出为 108 mJ, 脉冲宽度为 11.8 ns, 能量不稳定度<0.8%; 光-光效率18%, 可长时间稳定运行。

Abstract

Aiming at the applying demand of airborne laser ranging and laser indication, a compact and reliable electro-optical Q-switched laser was designed.Based on the rate equation with Q-switched,the relationship that the laser output energy increased with the increasing optimization parameter z and the pulse width decreases with increasing z was analyzed. The Nd∶YAG laser crystal of 6.5mm×56 mm , LD side pump, u model of folded cavity which applied cube-corner prism for folding the light, was used as the resonator cavity. The anti-misalignment ability of resonator cavity can be improved under the premise of gain satisfaction. Under the condition of 1.2 J implanted electrical pulse, the energy output of laser single pulse is 108 mJ, the pulse width is 11.8 ns, the energy instability is less than 0.8% and the light efficiency is 18%, which can be stably operated for a long time.

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闫雪静, 庞毓, 叶一东, 蒋建锋, 孙舒娟, 张旭光, 阮旭. 二极管泵浦折叠式电光调Q激光器[J]. 应用光学, 2018, 39(2): 274. Yan Xuejing, Pang Yu, Ye Yidong, Jiang Jianfeng, Sun Shujuan, Zhang Xuguang, Ruan Xu. LD pumped folded electro-optic Q-switched laser[J]. Journal of Applied Optics, 2018, 39(2): 274.

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