高平均功率薄片激光多通泵浦耦合系统设计
Pumped coupling system design of high average power disk laser
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摘要: 薄片激光器的耦合系统主要采用正交的快慢轴柱透镜及柱面反射镜对220个线阵的大尺寸二极管面阵光源进行准直和4通耦合，在泵浦区得到23 mm×27 mm的光斑，耦合效率达到85%，用CCD观测到泵浦区光斑的均匀性较好。采用光线追迹的方法从快慢轴耦合透镜和反射镜两方面进行计算模拟。泵浦模块快轴和慢轴两方向光经过相应耦合透镜后，薄片处泵浦区光强近乎平顶分布。Abstract: The article mainly discusses the design of pump coupling system that is one of the key technology of disk laser. In the optical system, we applied three fast and slow axis collimation cylinder lenses and one cylinder HR mirror. The fast and slow collimation cylinder lenses collimate 220-bar diode lasers stack's pump light. The cylinder HR mirror insure the pump laser 4 times pass through the laser medium. The beam size at the pumped area is 23 mm×27 mm. The coupling efficiency is 85%. The pumping light beam tested by CCD camera is nearly symmetric.
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Key words:
- diode lasers stack /
- disk laser /
- fast & slow axis cylinder lenses
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