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.