1064 nm高重频激光对可见光CCD探测器的干扰实验
2020-01-06
来源:乌哈旅游
第42卷第S2期 V01.42 No.S2 红外与激光工程 Infrared and Laser Engineering 2013年l2月 Dec.2013 1 064 nm高重频激光对可见光CCD探测器的干扰实验 王玺,聂劲松,李化,雷鹏,郝向南 (脉冲功率激光技术国家重点实验室(电子工程学院),安徽合肥230037) 摘 要:分别采用l 064 nln连续激光、不同高重频激光对可见光CCD探测器进行了干扰实验,观察 到CCD的串扰、饱和以及高重频激光作用时产生的横向亮线等一系列干扰现象。同时测量计算了各 种干扰现象相应的激光功率,研究了阈值功率与重频之间的关系,进一步分析了高重频激光的干扰机 理。实验表明:重频激光与连续激光具有不同的干扰现象,重频激光的干扰效果没有连续激光好,使 CCD传感器发生全屏饱和、全屏灰屏所需要的阈值功率比连续激光要高。 关键词:激光干扰; 高重频激光; 可见光CCD探测器; 闽值功率 中图分类号:TN249 文献标志码:A 文章编号:1007—2276(2013)¥2—0387—04 Experiment research on 1 064 nnl laser of high pulse-repetition- frqtrequency luency disturbisturbing visiSi ble CCD detectorsdetectors Wang Xi,Nie Jinsong,Li Hua,Lei Peng,Hao Xiangnan (State Key Laboratory of Pulsed Power Laser Technology(Electronic Engineering Institute),Hefei 230037。China) Abstract:The experiment that visible CCD was irradiated by 1 064nln CW laser,laser of different high pulse repetiitve frequency(PRF)were carried out individually.The disturbance phenomenon of crosstalk, saturation,and horizontal bright line were observed.The laser power of each disturbance state was measured,and the relationship between PRF and threshold power is also studied.Furthermore,the damage mechanisms of high PRF laser were analyzed in details.The results showed that the disturbance phenomenon of high PRF laser difered from the disturbance phenomenon of CW laser,and high PRF laser had unimportant influence on laser disturbing effect compare to CW laser.It was concluded that the threshold power of full--screen saturation and all・-ielfd gray screen irradiated by repetiitve frequency laser were higher than that of CW laser. Key words:laser disturbing;lsera of llih puglse repetiitve frequency;visible CCD detector; threshold power 收稿日期:2013-08-05;修订日期:2013-09-10 基金项目:国家973计划项目 作者简介:王玺(1981一),男,助理研究员,博士,主要从事光电对抗技术方面的研究。Email:eastangus@126.COlll 390 红外与激光工程 第42卷 3干扰机理分析 3.1横向干扰条纹 在不同重频激光对CCD探测器的干扰实验中, 发现激光重频较低时,串扰亮线两侧会出现显著的 横向条纹。这与相关文献中高重频脉冲激光辐照 CCD时,辐照区域外产生的漂移小光斑现象很相 似。漂移光斑的产生机制为:在激光脉冲期间,溢出 电流出现,此时经过溢出像素的传输势阱得到载流 子;在脉冲间隔期问,不再有溢出电流,此时经过溢 出像素的传输势阱中无载流子。在读出转移时刻,有 载流子的像元势阱表现为亮点;无载流子的像元势 阱表现为暗点。 由于实验中串扰亮线的横向宽度较大,载流子在 沿着垂直CCD纵向溢出的同时,也沿着水平CCD向 两侧势阱中溢出,所以漂移亮点扩展为横向漂移亮线。 3.2重频激光阈值较高现象 重频激光使CCD探测器出现全屏饱和、全屏灰 屏现象所需的激光功率值比连续激光作用时稍大, 这可能与CCD中的垂直溢出动作有关。入射激光越 强,垂直溢出结构的泄漏电流就越大,当泄漏电流增 大至垂直溢出结构的极限值后,其大小不再变化。 平均功率保持不变的条件下,重频激光在脉宽 范围内输出的峰值功率要比连续激光功率大得多, 因此重频脉冲激光辐照CCD时,泄漏电流也比连续 激光作用时大得多。这样一来,真正引起CCD饱和 的光电流就相对减小,需要进一步提高激光平均功 率来达到全屏饱和、全屏灰屏现象的阈值要求。当泄 漏电流增大至极限值后,其大小不再变化,这可能是 不同重频激光的干扰阈值差别不大的原因。 4结论 针对可见光CCD探测器,采用1 O64nm激光, 分别开展了:连续激光、不同重频激光对CCD探测 器的干扰实验。在激光干扰实验中,观察到局部区域 饱和、饱和串扰、全屏饱和以及全屏黑屏等一系列干 扰现象,发现了重频激光作用时的横向干扰亮线现 象。研究表明:重频激光与连续激光具有不同的干扰 现象,重频激光的干扰效果没有连续激光好,使 CCD传感器发生全屏饱和、全屏灰屏所需要的激光 功率比连续激光要大。 参考文献: [1]Dong Shujun,Zhang Junqi.Recoil naissance satellite and its countermeasures【J】.Electronic Information warfare Technology,2011,26(2):59-65.(in Chincse) 【2】 Song Yong,Han Qun,Wang Yungtian,et a1.The comparison nad the current developments of CMOSImage sensors and CCD【J】.Chinese Journal of Sdent ̄fw Instrument,2001, 22(3):387-389.(in Chinese) [3]Han Zhenlei.A dissection of dif ̄oronces and similarities of CCD and CMOS image sensors[If.Image Technology,2009 (4):39-42.(in Chinese) [4】Li Haiyan,Zhu Min,Lv Junwei,et a1.Experiment research and theory analysis for off-axis laser disturbing CCD detection sysetm【J】.Infrared and工珊盯Engineering,2011, 40(5):840-843.(in Chinese) 【5】Li Halyan,Zhu Mill,Lu Hongyi.Off-axis laser disturbing CCD imaging guidance weapons【J】.infrared and Laser Engineering,2009,38(1):66-69.(in Chinese) 【6】 Sun Chengwei.Effect of Laser Irradiation【M】.Beijing: National Defense Industry Press,2002.(in Chin ̄) [7】 Uu Chang an,Chen Jinbao,Ma Jinlong,et a1.Jamming of visible tight array CCD imaging system by infrared laser【J】. 凰 西Power Lase ̄and Particle Beams,2010,22(8):1727- l730.(in Chinese) 【8】Hao Xiangnan,Nie Jinsong,Li Hua.Temperature impact on saturation effect of CCD induced by highlight[J】. 伽一 Electronic Engineering,2011,38(7):54—58.(in Chinese) 【9】 Zhang Zhen,Cheng Xiang ai,Jiang Zongfu.Mechanism analysis of CCD exces ̄ve saturation effect induced by intense tight【J】.High Power Laser and Particle Beams, 2010,22(2):233-236.(in Chinese)