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提出了一种基于双镜环行光路的新型非平面多程激光放大器,它具有结构简单、体积小、空间对称性好、调节容易、光通放大次数多的优点。信号光束在放大器腔内沿着立体环行的非平面空间对称路径多次通过激光介质被放大,可在小型激光介质中获得高功率的放大激光输出。对放大器腔内光路进行了理论建模和参量分析,给出了部分光路模式的模拟图,分析了光路损耗与功率放大;初步设计了基于Yb:YAG薄片和激光二极管(LD)端面抽运的全固态非平面多程薄片激光放大器,适用于高功率激光放大。
A new type of non-planar multi-path laser amplifier based on double-mirror ring optical path is proposed. It has the advantages of simple structure, small volume, good space symmetry, easy adjustment and large number of times of light flux amplification. The signal beam is magnified multiple times in the amplifier cavity along the non-planar space symmetrical path of the three-dimensional ring through the laser medium to obtain the high-power amplified laser output in the small-sized laser medium. A theoretical model and parameter analysis of the optical path in the amplifier cavity are given. A simulation diagram of some optical modes is given, and the optical path loss and power amplification are analyzed. Based on the Yb: YAG lamellae and the laser diode (LD) end face pumped All-solid-state non-planar multi-pass thin-film laser amplifier for high-power laser amplification.