高功率固体激光器非稳定谐振腔设计

摘要

The traditional stable resonator was not easy to get high power and high beam quality at the same time. To solve this problem, design a high-power solid-state laser unstable resonator. That proposed an unstable resonator with variable reflectivity mirror as output mirror to improve the beam quality when use high power. Then measure the thermal focal length at high output power when the laser working. As the measure value to optimize the unstable resonator for high power laser output, then experiment and analyzed the measurement results. Those data show that it can get the uniform laser, and most of the energy was in the middle of the laser beam. That has significance for some industrial areas.%针对传统稳定谐振腔在高功率时光束质量变差的问题，设计了一种高功率固体激光器非稳定谐振腔。从提高激光器输出功率和改善光束质量的角度出发，以渐变反射率镜作为输出镜来设计非稳定谐振腔。在大功率输出的情况下，对工作物质的热焦距进行测量，根据测量的结果优化大功率输出时的谐振腔具体参数，并进行试验分析。结果表明：该方法能输出能量均匀的激光束，使大部分能量集中在中央，对一些工业加工领域具有重要的参考意义。