摘要
实验研究了薄膜偏振片的p偏振光的反射作用对输出p偏振光薄膜偏振片Nd∶YAG激光输出功率的影响,同时研究了输出s偏振光的薄膜偏振片固体激光对于提升激光输出功率的效果。研究表明:对于输出p偏振光薄膜偏振片Nd∶YAG激光器,薄膜偏振片对p偏振光反射作用所引起反射损耗功率随耦合镜透射率增大而减弱,在半导体激光器驱动电流为20 A,透射率为5%时,损耗功率达7.13 W,为p偏振光输出功率1.9倍,当透射率为30%时,损耗功率降为0.59 W,仅为p偏振光输出功率的8%;采用输出s偏振光激光结构可克服上述损耗,其效果在透射率较低时更为显著。在驱动电流为20 A,透射率为5%时,s偏振光激光器输出功率增加为7.77 W,为p偏振光输出功率的2.05倍;透射率为30%时,s偏振光输出功率仅为p偏振光输出功率的1.09倍。
It is experimentally investigated how the effect of thin film polarizer （TFP） reflecting p-polarized light in the solid state laser resonator, which outputs p-polarized light, decreases the output power. The effect of overcoming the decreasing by outputting s-polarized light laser resonator with an intracavity thin film polarizer is also studied. The results show that, in a p-polarized solid state laser with an intracavity thin film polarizer, the power loss caused by thin film polarizer reflecting p-polarized light decreases with increasing output mirror transmission. When the laser diode drive current is 20 A and the output mirror transmission is 5%, the power loss caused by the effect of thin film polarizer reflecting p-polarized light can reach 7.13 W, which is 1.9 times of the output power of the resonator. When the output mirror transmission increases to 30%, the power loss decreases to 0.59 W, which is 8% of output power. The output s-polarized light laser resonator configure with an intracavity thin film polarizer can avoid the power loss caused by the thin film polarizer reflecting p-polarized light, and improve output power. The improving effect of this resonator configure is more outstanding, when output mirror transmission is small. When the drive current is 20 A and output mirror transmission is 5%, the output power of output s-polarized light resonator is 7.77 W, which is 2.05 times of that of output p-polarized light resonator. When the output mirror transmission increases to 30%, the output power of output s-polarized light is only 1.09 times of that of output p-polarizer light resonator.
出处
《激光与光电子学进展》
CSCD
北大核心
2015年第6期140-144,共5页
Laser & Optoelectronics Progress
基金
广东省教育厅创新强校项目
关键词
激光器
薄膜偏振片
p偏振光
s偏振光
反射损耗
lasers
thin film polarizer
p-polarized light
s-polarized light
reflecting loss
作者简介
杨晓冬（1968-），男，博士，教授，主要从事光学教学及固体激光技术方面的研究。E—mail：xjyxd@126．com
