Time-domain characteristics of active detecting echo laser pulse

Yang Yuchuan; Tan Bitao; Long Chao; Chen Lizi; Zhang Jihua; Chen Junyan

The active laser detection basing on cat's eye effect can detect space optical observation equipments. The laser pulse transmitting in the atmosphere will be broadened to affect the echo waveform distribution from the target, and the echo pulse width is different from the dissimilar reflective target, which can be used to determine detecting target. Based on the photon scattering theory, the pulse broadening caused by the aerosol scattering effect near the ground was analyzed, the calculation physical model was built to resolve cat's eye and diffuse reflection echo pulse broadening and the main factors affecting pulse broadening were provided. The active detecting dynamic tests aiming at the optical cabin loaded on the aeroboat were implemented to validate the physical model, the test results show that the cat's eye and background diffusion reflection echo signals are respectively broadened 20-30 ns and 90 ns after 8～10 km slant path atmospheric transmission. Based on the built physical model, the theoretical pulse broadening on dynamic test condition is accordance with the actual test results, which provides theoretical proof to distinguish and pickup cat's eye echo signal.

1. Northwest Institute of Nuclear Technology,Xi'an 710024,China

Received Date: 2013-04-10

Rev Recd Date: 2013-05-15

Publish Date: 2013-12-25

Key words:

Abstract: The active laser detection basing on cat's eye effect can detect space optical observation equipments. The laser pulse transmitting in the atmosphere will be broadened to affect the echo waveform distribution from the target, and the echo pulse width is different from the dissimilar reflective target, which can be used to determine detecting target. Based on the photon scattering theory, the pulse broadening caused by the aerosol scattering effect near the ground was analyzed, the calculation physical model was built to resolve cat's eye and diffuse reflection echo pulse broadening and the main factors affecting pulse broadening were provided. The active detecting dynamic tests aiming at the optical cabin loaded on the aeroboat were implemented to validate the physical model, the test results show that the cat's eye and background diffusion reflection echo signals are respectively broadened 20-30 ns and 90 ns after 8～10 km slant path atmospheric transmission. Based on the built physical model, the theoretical pulse broadening on dynamic test condition is accordance with the actual test results, which provides theoretical proof to distinguish and pickup cat's eye echo signal.

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Reference (12)

[1]	Wu Dengxi, Wang Shiyu, Zheng Yongchao. Experiment on the atmospheric turbulent influence on active far IR laser detection[J]. Infrared and Laser Engineering, 2009, 38(6): 986-990. (in Chinese) 吴登喜, 王石语, 郑永超. 大气湍流对红外激光主动探测影响的试验[J]. 红外与激光工程, 2009, 38(6): 986-990.
[2]	Lei Ping, Xing Hui, Xue Ting, et al. Analysis of detecting capability for active laser detection system[J]. Infrared and Laser Engineering, 2009, 38(6): 981-983. (in Chinese) 雷萍, 刑晖, 薛挺, 等. 激光主动探测系统的探测能力分析[J]. 红外与激光工程, 2009, 38(6): 981-983.
[3]	Lecocq C, Deshors G, Lado-bordowsky O, et al. Sight laser detection modeling[C]//SPIE, 2003, 5086: 280-286.
[4]	Glaser I. Diffractive surface for cat-eye array retro-reflectors[C]//SPIE, 2008, 7100: 71001Q-1-71001Q-9.
[5]	Titterton D H. A review of the development of optical countermeasures[C]//SPIE, 2004, 5615: 1-15.
[6]	Liang Bo, Zhu Hai, Chen Weibiao. Simulation of laser communication channel from atmosphere to ocean[J]. Acta Optica Sinica, 2007, 27(7): 1166-1172. (in Chinese) 梁波, 朱海, 陈卫标. 大气到海洋激光通信信道仿真[J]. 光学学报, 2007, 27(7): 1166-1172.
[7]	Han Cheng, Bai Baoxing, Yang Huamin, et al. Study and simulation of air influence on laser pulse transmission delay time[J]. Acta Optica Sinica, 2009, 29(8): 2046-2050. (in Chinese) 韩成, 白宝兴, 杨华民, 等. 大气信道对激光脉冲延迟时间影响的仿真研究[J]. 光学学报, 2009, 29(8): 2046-2050.
[8]	Stotts L B. Closed form expression for optical pulse broadening in multiple-scattering media[J]. Appl Opt, 1978, 17(4), 504-505.
[9]	Jerlov N G. Marine Optics[M]. New York: Elesvier Scientific Pub Co, 1976.
[10]	Arnush D. Underwater Light-beam propagation in the small-angle-scattering approximation[J]. J Opt Soc Am, 1972, 62(9): 1109-1111.
[11]	Guo Guanjun, Jiao Weiyan, Qu Shiliang, et al. Effect of pulse spreading on the ranging performance of airborne laser scanner[J]. Opto-Electronic Engineering, 2010, 37(3): 51-60. (in Chinese) 郭冠军, 焦威严, 曲士良, 等. 脉冲展宽对机载激光扫描仪性能的影响[J]. 光学工程, 2010, 37(3): 51-60.
[12]	Bucher E, Lerner R M. Experiments on light pulse communication and propagation through atmospheric clouds[J]. Appl Opt, 1973, 12(10): 2401-2414.

Time-domain characteristics of active detecting echo laser pulse

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