A Dichroic Beamsplitter for the Laser Protection of Infrared Detectors
Source abstract
Abstract
The design and fabrication approach of a dichroic beamsplitter to meet the protection requirements of infrared detectors for blinding laser weapons is presented. The dichroic beamsplitter must protect against 1064 and 532 nm lasers and have high transmittance in the detection beam band of 3.6–4.7 µm. In order to realize the protection and antireflection (AR) functions of the dichroic beamsplitter, Ta2O5, which has a wide band gap and high thermodynamic stability, was selected as the high-refractive-index material. A multilayer stack was deposited on a silicon substrate by ion-assisted electron beam evaporation. The manufactured dichroic beamsplitter features a high laser-induced damage threshold (LIDT), excellent spectral characteristics in the requested spectral region, and good environmental stability.
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Research context
OpenAlex topics: Photorefractive and Nonlinear Optics · Solid State Laser Technologies · Laser Material Processing Techniques
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
Affiliations
Institute of Precision Optical Engineering, Shanghai 200092, China
MOE Key Laboratory of Advanced Micro-Structured Materials, Shanghai 200092, China
Shanghai Frontiers Science Center of Digital Optics, Shanghai 200092, China
Shanghai Professional Technical Service Platform for FullSpectrum and High-Performance Optical Thin Film Devices and Applications, Shanghai 200092, China
School of Physics Science and Engineering, Tongji University, Shanghai 200092, China
Funding
National Natural Science Foundation of China
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