Signal and Noise Ratio Analysis of the Optical Subsystem In Grating-based Laser Warning System

摘要

Real time and reliable Measurement of the wavelength and arriving direction of tunable pulsed laser in the harsh environment is a challenge issue. The difficulty lies in the influence of background light such as sunlight , glare of gunfire and lightning on the detection system, we have developed a grating-based laser receiving system, this system can be used detect the wavelength and arriving direction of pulsed tunable laser in the spectral range from 500-1100nm, the filed of view is about 22.5 o in both longitude and latitude . the paper theoretically analyzes the SNR of the optical subsystem caused by sunlight, and simulation results have certain instructional meaning in design the optical subsystem.