激光对长波红外探测设备的干扰效应研究

理论分析了激光对长波红外探测设备的干扰原理，搭建了干扰试验环境，通过试验研究了9.4 μm激光的功率、重复频率、束散角等参数对探测设备的饱和串音影响，利用激光在探测器上所呈光斑大小以及光斑与背景对比度衡量红外探测设备产生饱和串音的程度，经过分析确定了激光对红外探测设备的干扰效应取决于到达红外探测器上的激光功率密度。试验得到了在重复频率为20 kHz时，长波红外探测设备的干扰阈值为39.89 mW/cm2，取得了与理论分析一致的试验结论，为红外探测设备的防护技术研究奠定了理论基础。

Abstract

Theoretical analysis is made to the principle of laser jamming on long wave infrared detecting equipment.The environment for laser jamming experiment was set up, through which the crosstalk effect of 9.4 μm laser with different parameters of power, frequency and angle of divergence on detecting equipment was studied by experiments.The crosstalk level was scaled by spot of laser on detector and contrast ratio of the spot and background.It is concluded that the crosstalk effect is determined by laser power density on the detector.It is obtained through experiment that when laser frequency is 20 kHz, the jamming threshold of long wave infrared detecting equipment is 39.89 mW/cm2, which is consistent with the theoretical analysis.

参考文献

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初学莲, 姜冶, 蔡猛, 郁品一, 张元生, 周德召. 激光对长波红外探测设备的干扰效应研究[J]. 电光与控制, 2016, 23(3): 32. CHU Xue-lian, JIANG Ye, CAI Meng, YU Pin-yi, ZHANG Yuan-sheng, ZHOU De-zhao. Jamming Effect of Laser on Long Wave Infrared Detecting Equipment[J]. Electronics Optics & Control, 2016, 23(3): 32.

激光对长波红外探测设备的干扰效应研究

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