脉冲激光对星载探测器的干扰和损伤分析
Analysis of Pulsed Laser Disturbance and Damage on Satellite-borne Detector
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摘要: 该文采用高斯光束辐照半无限固体的温升模型，研究了探测器表面温升与激光干扰和损伤阈值的变化关系。发现脉冲CO2激光对探测器的干扰和损伤与脉宽无关，只与脉冲能量密度有关，探测器表面温升与入射激光脉冲能量密度成正比关系，干扰阈值比损伤阈值要低一个数量级。通过理论分析，求出了干扰和损伤星载HgCdTe探测器所需CO2激光的脉冲能量。定性分析结果表明高平均功率重频脉冲激光更容易对星载探测器造成有效干扰和永久性损伤。Abstract: A semi-infinite thermal model is presented which describes temperature rise in photoelectric detector under pulsed laser irradiation. The laser disturbance and damage thresholds with the detectors temperature rise are analyzed. The results show the disturbance and damage of detector are independent of the CO2 laser pulse-width, only depend directly on the energy density, at the same time, the disturbance threshold is one order lower than damage threshold. A numeric analysis about pulse CO2 laser irradiating satellite-borne HgCdTe detector is given. The feasibility of high average repetitive pulse laser disturbance and damage satellite-borne detector is qualitatively analyzed.
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Wood R M. Laser damage in optical material. Adam Hilger, Bristol and Boston, 1986: 104-106.[2]蒋志平, 陆启生, 刘泽金等. 激光辐照PC型HgCdTe探测器热效应的计算. 应用激光, 1995, 15(4):155-156.[3]Vaidya.Nathan. Laser damage in MWIR MCT detector. SPIE, 1995, 2114: 726-731.[4]周建民, 郭劲, 付有余. 激光对远程目标光电探测器的干扰技术分析. 导体光电, 2004, 25(4): 326-328.[5]Bartoli F, Esterowitz L, Kruner M, et al..Irreversible laser damage in ir detector materials[J].Appl. Opt.1977, 16(11):2934-2937[6]Vogt T, Joeckle R, Schwab C. Study of the effects of CO2 laser irradiation on CdO.204HgO.796Te. Materials Science and Engineering, 1993, A168: 75-79.[7]Arora V K, Dawar A L. Effect of laser irradiation on the responsivity of HgCdTe detectors.[J]. Infrared Physics Technology.1996,37:245-[8]柯常军, 万重怡. 红外光电探测器的激光损伤分析.光学技术, 2002, 28(2): 118-122. -
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