脈沖激光對星載探測器的干擾和損傷分析
Analysis of Pulsed Laser Disturbance and Damage on Satellite-borne Detector
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摘要: 該文采用高斯光束輻照半無限固體的溫升模型，研究了探測器表面溫升與激光干擾和損傷閾值的變化關(guān)系。發(fā)現(xiàn)脈沖CO2激光對探測器的干擾和損傷與脈寬無關(guān)，只與脈沖能量密度有關(guān)，探測器表面溫升與入射激光脈沖能量密度成正比關(guān)系，干擾閾值比損傷閾值要低一個(gè)數(shù)量級(jí)。通過理論分析，求出了干擾和損傷星載HgCdTe探測器所需CO2激光的脈沖能量。定性分析結(jié)果表明高平均功率重頻脈沖激光更容易對星載探測器造成有效干擾和永久性損傷。
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關(guān)鍵詞:
- 激光干擾; 激光損傷; 脈沖激光; 星載探測器
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. -
Wood R M. Laser damage in optical material. Adam Hilger, Bristol and Boston, 1986: 104-106.[2]蔣志平, 陸啟生, 劉澤金等. 激光輻照PC型HgCdTe探測器熱效應(yīng)的計(jì)算. 應(yīng)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, 郭勁, 付有余. 激光對遠(yuǎn)程目標(biāo)光電探測器的干擾技術(shù)分析. 導(dǎo)體光電, 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]柯常軍, 萬重怡. 紅外光電探測器的激光損傷分析.光學(xué)技術(shù), 2002, 28(2): 118-122. -
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