光谱学与光谱分析, 2023, 43 (8): 2581, 网络出版: 2024-01-10  

宽光谱多参数激光告警探测研究

Research on Broadband Spectrum Multi-Parameter Laser Warning Detection Technology
作者单位
1 中北大学山西省光电信息与仪器工程技术研究中心, 山西 太原 030051中北大学前沿交叉科学研究院, 山西 太原 030051
2 中北大学山西省光电信息与仪器工程技术研究中心, 山西 太原 030051
3 中北大学前沿交叉科学研究院, 山西 太原 030051
摘要
随着激光技术的发展, 激光**得到了快速发展, 针对来袭激光的威胁, 激光告警也成为目前各国发展的重点, 不同的激光告警系统探测不同的参数, 根据告警参数采取相应的躲避和反击措施; 目前激光告警主要探测参数有来袭激光方位角、 俯仰角、 激光波长、 激光脉冲宽度等, 但现有激光告警系统无法实现多参数的同时探测, 且光谱范围窄、 视场小、 探测俯仰角和方位角为相对角度、 无法获得绝对来袭方向。 为此本文提出宽光谱波段、 大视场、 多参数激光告警新方法, 可实现450~1 700 nm宽光谱来袭激光波长、 绝对方位角、 绝对俯仰角、 脉冲宽度多参数的高精度综合测量, 该方法主要由激光脉冲宽度测量、 绝对角度及激光波长测量、 控制及数据处理三大部分组成。 其中脉冲宽度测量模块由光学镜头、 多带通窄带滤光片、 高速光电探测器组成, 实现来袭脉冲激光的高速光电转换; 绝对角度及激光波长测量模块由光栅、 大视场宽波段消色差镜头、 多带通窄带滤光片、 宽波段面阵探测器、 三维电子罗盘组成, 通过一级和零级衍射光斑位置获得来袭激光波长、 相对方位角和相对俯仰角信息, 结合三维电子罗盘测得的方位角、 俯仰角以及横滚角, 进而获得来袭激光的三维绝对方位角和绝对俯仰角。 多带通窄带滤光片主要是根据常用几个军用激光波长进行选通滤光, 有效滤除背景光的影响, 降低系统虚警、 漏警。 理论分析推导具体测量方法和参数, 设计宽光谱多参数激光告警探测系统样机, 并进行实验可行性验证。 实验结果表明, 该系统的方位角视场120°、 俯仰角视场96°、 角度测量精度优于1°、 中心波长测量精度优于10 nm、 脉宽测量精度优于3 ns。 该技术将为海、 陆、 空、 天领域对来袭激光的高精度多参数综合探测奠定基础, 有望提高复杂战场的生存能力。
Abstract
With the development of laser technology, laser warning technology has become the focus of research in various countries to achieve defense against various incoming lasers, and corresponding evasion and counterattack measurements are taken according to the parameters detected by the laser warning system. At present, the main parameters of laser warning detection include incoming laser azimuth, pitch angle, laser wavelength and laser pulse width. However, the existing laser warning system can not achieve multi-parameter simultaneous detection, and the absolute direction of the incoming laser cannot be obtained due to the narrower spectral range, limited field of view, and relative azimuth angle of detection. In this paper, a new method that broadband, large field of view, multi-parameter laser warning is proposed to realize the high-precision comprehensive measurement of the wavelength, absolute azimuth, absolute pitch angle, and pulse width of incoming laser in the range of 450~1 700 nm, which is mainly composed of laser pulse width measurement, absolute angle and laser wavelength measurement, control and data processing. The pulse width measurement module comprises an optical lens, multiband narrowband filter, and high-speed photodetector to realize the photoelectric conversion of the incoming pulsed laser. The absolute angle and laser wavelength measurement module that is composed of a grating, large field of view broadband achromatic lens, multiband narrowband filter, broadband area array detector, and a three-dimensional electronic compass can obtain the incoming laser wavelength, relative azimuth and relative pitch angle by the position of the first and zero diffraction spots. Then, combined with the measured direction angle, pitch angle and roll angle of the three-dimensional electronic compass, the incoming lasers three-dimensional absolute azimuth and absolute pitch angle are obtained. The multiband narrowband filter is mainly based on the strobe filter of several commonly used military laser wavelengths, which effectively filters out the influence of the background light and reduces the systems false warning and leakage warning. After the theoretical derivation and analysis of the measurement method and parameters, we design a broadband multi-parameter laser warning detection system prototype, verifying the experimental feasibility. The experimental results show that the systems azimuth and pitch angles can reach 120° and 96°, respectively. The angle measurement accuracy is better than 1°, the central wavelength measurement accuracy is better than 10 nm, and the pulse width measurement accuracy is better than 5 ns. This technology lays the foundation for the high-precision multi-parameter comprehensive detection of incoming lasers in the sea, land, air and space fields and is expected to improve the survivability in complex battlefields.

张瑞, 杨雪梅, 石金, 张子暄, 丁鑫, 李晓, 王志斌, 李孟委. 宽光谱多参数激光告警探测研究[J]. 光谱学与光谱分析, 2023, 43(8): 2581. ZHANG Rui, YANG Xue-mei, SHI Jin, ZHANG Zi-xuan, DING Xin, LI Xiao, WANG Zhi-bin, LI Meng-wei. Research on Broadband Spectrum Multi-Parameter Laser Warning Detection Technology[J]. Spectroscopy and Spectral Analysis, 2023, 43(8): 2581.

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