ZHANG Yin,SHAO Jun-feng,TANG Wei.Damage effect of TEA CO2 long wave infrared laser on detector assembly of infrared staring imaging system[J].Optics and Precision Engineering,2021,29(06):1217-1224. DOI: 10.37188/OPE.20212906.1217.
ZHANG Yin,SHAO Jun-feng,TANG Wei.Damage effect of TEA CO2 long wave infrared laser on detector assembly of infrared staring imaging system[J].Optics and Precision Engineering,2021,29(06):1217-1224. DOI: 10.37188/OPE.20212906.1217.DOI:
Damage effect of TEA CO2 long wave infrared laser on detector assembly of infrared staring imaging system
To explore the mechanism of damage caused to a HgCdTe infrared detector by a long-wave infrared laser, the damage caused by a 9.3 μm laser to an HgCdTe infrared detector was experimentally analyzed. A finite element simulation model of the HgCdTe infrared detector irradiated by the laser was established in ANSYS. The temperature rise distribution of the detector model under CO
2
laser irradiation with a 9.3 μm pulse was obtained. The theoretical damage threshold of the detector was determined based on whether the melting temperature had been reached. Subsequently, the damage threshold of an HgCdTe infrare
d detector in an actual working environment was determined through field experiments. The results show that the damage threshold is 0.54-1.1 J/cm
2
. The simulation results, which predict a damage threshold of 0.69-1.23 J/cm
2
, and the experimental results are in agreement with the Bartoli theory and are thus considered to be valid.
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