高重频激光对测距机干扰试验研究  

Experimental study on the jamming of high-repetition rate laser to rangefinder

作　　者：张澜 万勇[1] 刘全喜[1] 龙幸[1] 张小川[1] 邬焕欣 衣学斌[1] 卢德林 杲静 Zhang Lan;Wan Yong;Liu Quanxi;Long Xing;Zhang Xiaochuan;Wu Huanxin;Yi Xuebin;Lu Delin;Gao Jing(Southwest Institute of Technical Physics,Chengdu 610041,China)

机构地区：[1]西南技术物理研究所,四川成都610041

出　　处：《红外与激光工程》2024年第4期110-119,共10页Infrared and Laser Engineering

摘　　要：高重频激光干扰是对脉冲式激光测距机的一种有效干扰手段,为探究高重频激光对测距机干扰效能的影响因素及规律,开展相关的理论分析与试验研究。试验研究了干扰激光的功率、重复频率及干扰距离对测距机干扰效能的影响。结果表明:存在一个与干扰激光频率相关的最小干扰距离,干扰激光的重复频率越高,最小干扰距离越小,有效干扰距离范围越大。当实际干扰距离大于最小干扰距离时,若干扰激光的功率不足,则无干扰效果;干扰成功后继续增大干扰激光功率,则被干扰后测距结果会趋于正态分布,且干扰激光功率越高,测距结果正态分布中心越趋近于最小干扰距离,但受干扰的测距结果最小值会始终分布于测距机盲区附近。Objective Because of the advantages of small size,fast measurement speed,low consumption and high ranging accuracy,pulsed laser rangefinder is widely used in a wide range of military equipment.Therefore,it is crucial to ensure that it is impossible to obtain the correct target distance information.Jamming methods for laser rangefinder can be divided into two kinds:deception jamming and blinding jamming.When the distance between enemy and us is far away,the blinding jamming has higher requirements on the performance of laser and the accuracy of matching tracking equipment,which will lead to an increase in cost and difficulty.So deception jamming is more used in the interference of rangefinder.And high-repetition rate laser technology is always employed in it.At present,most of research on this technology are theoretical analysis and lack of experimental verification.To fill the gap in this part,the influence of high-repetition rate laser power and frequency on jamming efficiency of pulsed laser rangefinder at a fixed distance has been explored in experiments.Meanwhile,the effective jamming rate of laser with different repetition frequency at different distances has also been researched.These studies have a certain reference value for practical engineering application.Methods The experimental device is composed of a laser rangefinder,a high-repetition rate laser jammer and a protected target(Fig.3).Because the high repetition rate laser jammers are positioned near the protected target,the distance between them and the protected target can be ignored when long-range jamming is carried out.The distance between target and rangefinder without jamming has been measured first.When the frequency of jamming laser is 150 kHz,this distance is measured at different pump currents.Above tests have been repeated respectively at frequencies of 30 kHz and 50 kHz.Effective jamming rate of laser with different frequencies and distances has also been investigated.Results and Discussions The output power and effective jamming probabil

关 键 词：高重频激光 脉冲式激光测距 激光干扰 最小干扰距离 干扰效能 

分 类 号：TN977[电子电信—信号与信息处理]