量子电子学报, 2012, 29 (2): 147, 网络出版: 2012-03-30  

电光调QNd:YAG固体激光器脉冲展宽研究

Pulse stretching in an electro-optical Q-switched Nd:YAG solid-state laser
作者单位
中国科学院安徽光学精密机械研究所,安徽省光子器件与材料重点实验室, 安徽 合肥 230031
摘要
从理论上分析了影响调Q激光器脉冲宽度的因素,利用速率方程建立了 电光调Q脉冲展宽输出过程中反 转粒子数密度、光子数密度、腔损耗之间的变化关系式,并进行了数值模拟,绘出了输出平滑脉冲时的腔损 耗变化曲线,在实验中设计了合适的谐振腔结构,并通过使用两个闸流管作为高压开关控制KD*P上的 电压变化波形,从而控制腔损耗使其满足脉冲展宽的条件,在实验上最终获得了420 ns的调Q激光脉冲。
Abstract
Theoretical analysis about elements that influence pulse width of Q-switched laser was carried out. On the basis of rate equation, expressions of the relations among inversion density, photon density, and cavity loss under pulse stretching conditions were established. The cavity loss’s variation curve was plotted after numerical simulation when flat-topped laser pulse was obtained. In the experiment, proper structure of resonant cavity was designed, and by taking advantage of two thyratrons as high-voltage switches, the variation of voltage on KD*P can be controlled, so the loss can be controlled to make it satisfy the pulse stretching conditions. Finally, 420 ns Q-switched laser pulse was obtained.

周健, 郭强, 黄荔, 王首长, 吴朝辉. 电光调QNd:YAG固体激光器脉冲展宽研究[J]. 量子电子学报, 2012, 29(2): 147. ZHOU Jian, GUO Qiang, HUANG Li, WANG Shou-zhang, WU Zhao-hui. Pulse stretching in an electro-optical Q-switched Nd:YAG solid-state laser[J]. Chinese Journal of Quantum Electronics, 2012, 29(2): 147.

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