A co-colored thin film device for laser-induced damage threshold test system is presented in this paper, to make the
laser-induced damage threshold tester operating at 532nm and 1064nm band. Through TFC simulation software, a film
system of high-reflection, high -transmittance, resistance to laser damage membrane is designed and optimized. Using
thermal evaporation technique to plate film, the optical properties of the coating and performance of the laser-induced
damage are tested, and the reflectance and transmittance and damage threshold are measured. The results show that, the
measured parameters, the reflectance R ≥ 98%@532nm, the transmittance T ≥ 98%@1064nm, the laser-induced damage
threshold LIDT ≥ 4.5J/cm2 , meet the design requirements, which lays the foundation of achieving laser-induced damage threshold multifunction tester.
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