反射式可调激光衰减器的研究

针对1 064 nm激光波长，设计出一种基于斜入射时偏振光在介质分界面上不同反射率原理的连续可调激光衰减器，角度控制精度为6、损伤阈值为100 W/cm2（连续）、0.1 J/cm2(10 ns脉冲)。实际测量了衰减器的透过率，透过率范围为8.510-5～1。分析了衰减器对传输光束质量的影响，并针对衰减器的性能改善进行了探讨。

Study on reflective adjustable laser attenuator

Based on the principle of reflected polarized light with various reflectances when it enters on dielectric interface at different oblique incidence angles, an adjustable laser attenuator working at 1 064 nm wavelength was designed, with 6 angle accurate, 100 W/cm2 (continuous-wave) and 0.1 J/cm2 (10ns pulses) damage threshold. The transmittance of attenuator was measured,the range of transmittance was 8.510-5～1. And the effect factors for propagation beam quality caused by attenuator were investigated. Finally, the suggestion for improving the performance of the attenuator was discussed.