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Simulation of Temperature Field of HgCdTe Detector with Laser Radiation |
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Abstract: Photoelectrical detectors are widely used in many fields such as satellites, missiles, remote sensing and so on, both in civil and military applications and play a major role in social security and economic development. When the detector is irradiated by high power laser, the thermal effect is the major cause of damage. The laser energy absorbed by the detector raises temperature on the surface of the detector. When the temperature goes beyond the normal temperature range, the detector will not work normally and gives wrong output signals. The temperature distribution is related with the detector structure and the material's physical properties. In order to obtain the temperature distribution in the detector, a heat conduction model is established. Using the Matlab software, the simulation is carried out for the temperature distribution in HgCdTe detector with laser radiation and the relationship between the heat conductive coefficient, the thickness of glue and the laser damage threshold under specific external environment conditions is obtained. The results can provide some guidance for the data analysis of detectors and the detector's laser proof design.
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Received: 17 August 2010
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