激光与光电子学进展, 2015, 52 (6): 061401, 网络出版: 2015-06-03  

输出s线偏振光薄膜偏振片Nd∶YAG激光研究

Investigation of Thin Film Polarizer Nd:YAG Laser Output S-Polarized Light
作者单位
嘉应学院物理与光信息科技学院, 广东 梅州 514015
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。
Abstract
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.

杨晓冬, 陈书汉, 朱健. 输出s线偏振光薄膜偏振片Nd∶YAG激光研究[J]. 激光与光电子学进展, 2015, 52(6): 061401. Yang Xiaodong, Chen Shuhan, Zhu Jian. Investigation of Thin Film Polarizer Nd:YAG Laser Output S-Polarized Light[J]. Laser & Optoelectronics Progress, 2015, 52(6): 061401.

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