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5 November 2018 Numerical analysis of the temperature field in HgCdTe detector by CW laser irradiation
Xiao-dong Ren, Wu-hu Lei, Xuhui Weng
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Proceedings Volume 10811, High-Power Lasers and Applications IX; 1081116 (2018) https://doi.org/10.1117/12.2501235
Event: SPIE/COS Photonics Asia, 2018, Beijing, China
Abstract
Based on the heat conduction theory, a theoretical model of HgCdTe detector irradiated by 10.6μm CW laser is constructed. The thermal effect of the detector is analyzed by finite element method when the laser spot velocity is 0m/s, 4mm/s and 10mm/s respectively with the peak power density of 50KW/cm2 . The results show that, the temperature of irradiation point rises rapidly when v=0 mm/s, but the rising speed will be slower and slower and finally reaches the equilibrium temperature under the combined effect of laser irradiation and heat conduction. In the case of relative motion, the position of the peak temperature gradually shifts along the velocity direction. The peak temperature gradually decreases with the increase of the moving speed, and the width of the temperature peak gradually widens with the increasing speed. Relative motion should be considered when studying laser radiation and laser protection.
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Xiao-dong Ren, Wu-hu Lei, and Xuhui Weng "Numerical analysis of the temperature field in HgCdTe detector by CW laser irradiation", Proc. SPIE 10811, High-Power Lasers and Applications IX, 1081116 (5 November 2018); https://doi.org/10.1117/12.2501235
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KEYWORDS
Sensors
Mercury cadmium telluride
Continuous wave operation
Laser irradiation
Thermal effects
Laser sources
Finite element methods
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