谐振腔失谐对二极管泵浦Nd:YAG激光器性能的影响

发布时间：2018-01-09 09:24

  本文关键词：谐振腔失谐对二极管泵浦Nd:YAG激光器性能的影响　出处：《红外与激光工程》2017年06期 　论文类型：期刊论文

  更多相关文章： 谐振腔失谐 速率方程 可靠性 Nd YAG

【摘要】：理论和实验研究了激光器谐振腔失谐对激光器性能的影响。一方面,理论上,基于准连续二极管泵浦、电光调Q固体激光器的特点,建立了包含谐振腔失谐修正函数的速率方程模型。通过数值仿真,模拟了不同激光模式、光斑半径、孔阑半径、孔阑位置情况下,谐振腔失谐对激光器损耗以及激光性能的影响。另一方面,实验测量了谐振腔失谐对激光器性能的影响。对于长250 mm、最小孔阑半径3.5 mm的凹凸非稳腔,凹面全反镜失谐比凸面输出镜失谐对激光器性能的影响大,当凹面全反镜水平方向失谐角度由0增加到490μrad时,激光能量由220 m J下降到150.9 m J,下降31.4%,脉冲宽度由5 ns增大到6.5 ns,实验结果和理论分析结果基本相符,说明激光模型的正确性。建立的模型与实验方法为预测激光器谐振腔失谐对激光器性能的影响提供了一种有效工具,为高可靠性激光器设计提供了依据。
[Abstract]:Theoretical and experimental study of the laser resonator detuning on the performance of the laser. On the one hand, in theory, based on quasi-continuous diode pumping, electro-optic Q-switched solid-state laser characteristics. The rate equation model including the resonator detuning correction function is established. By numerical simulation, different laser modes, spot radius, aperture radius and aperture position are simulated. The influence of cavity detuning on laser loss and laser performance is also studied. On the other hand, the effect of resonator detuning on laser performance is measured experimentally. For the concave and convex unstable cavity with the smallest aperture radius of 3.5 mm, the detuning of the concave full mirror is more important than the detuning of the convex output mirror on the performance of the laser. When the angle of detuning in horizontal direction of concave full mirror increases from 0 to 490 渭 rad, the laser energy decreases from 220mJ to 150.9mJ, which decreases by 31.4%. The pulse width is increased from 5 ns to 6.5 ns, and the experimental results are in good agreement with the theoretical analysis results. The established model and experimental method provide an effective tool for predicting the influence of laser resonator detuning on laser performance and provide a basis for the design of high reliability laser.
【作者单位】： 北京空间机电研究所;
【分类号】：TN248.1
【正文快照】： 0 引言 LD泵浦的全固态激光器结构紧凑、效率高、稳定好、寿命长,在星载激光雷达和空间光电对抗等领域内有广泛的应用[1-7]。由于空间环境的特殊性,空间应用的激光器不仅要满足性能指标要求,还要满足可靠性要求。激光谐振腔是激光器实现激光能量提取和输出的关键。谐振腔失谐，

本文编号：1400848