光栅激光告警系统中信号光与天空光的能量分析  

Analysis of Signal Light and Skylight Energy in Grating-Based Laser Warning System

作　　者：王志斌[1] 张记龙[1] 吴峰[2] 

机构地区：[1]中北大学仪器科学与动态测试教育部重点实验室,山西太原030051 [2]中北大学理学院,山西太原030051

出　　处：《测试技术学报》2006年第1期92-94,共3页Journal of Test and Measurement Technology

基　　金：国家自然科学基金资助项目(60378019);山西省科技攻关资助项目(20041501ZX)

摘　　要：为了在天空背景下实时测量宽波段脉冲激光波长和方向,提出了使用闪耀光栅衍射测量脉冲激光波长和方向的方法.用傅立叶变换分析天空背景和脉冲激光的光谱分布.通过对透射率函数的傅立叶级数展开,得到光栅衍射谱线的强度,对信号光谱线的最小强度、背景光谱线的最大强度和噪声强度的比较,得到设计的可行性.光路主要由特制光栅、柱面镜以及CCD探测器构成.In order to measure the wavelength and azimuth of wide band pulsed laser real-timely in the sky background, the diffraction grating is applied. Fourier transform spectrometry is used to analyze the spectral distributions of sky background and the pulsed laser. The intensity of grating diffraction spectrum is obtained by the Fourier series expansion of the transmissivity function. Finally, the design feasibility is analyzed by comparing the minimum signal spectral intensity with the maximal spectral intensity of the background light and the noise intensity. The optical system is mainly made up of special grating, cylindrical lens and CCD detector.

关 键 词：激光波长 脉冲激光 光栅衍射 傅里叶变换 

分 类 号：TN247[电子电信—物理电子学]