时间门控时序选通拉曼光谱技术及背负式小型化远程拉曼光谱装备

Time-gated timing-selective Raman spectroscopy technique and backpack miniaturized remote Raman spectroscopy equipment

时间门控时序选通拉曼光谱技术是一种精准控制激光脉冲和探测器快门时序关系,从而进行时序选通收集拉曼信号,并抑制背景干扰的拉曼光谱技术。在远程拉曼探测领域,利用时间门控可以有效阻挡环境光,使拉曼光谱获得优异的信号/噪声比。本文系统介绍了时间门控时序选通拉曼技术及其应用,其中重点关注了皮秒时间门控的技术特点与前景。最后,本文介绍了本团队自主研制的国内首台背负式小型化远程拉曼光谱装备,该装备在0~2 m内可探测到≤1μg, 13 m内可探测到≤1 mg的典型爆炸物和危险化学品目标物,在工业泄露监测、恐怖袭击预防和防爆排雷等公共安全预警与监测等方面有着广阔的应用前景。

Time-gated timing-selective Raman spectroscopy technique is a Raman spectroscopy technique that precisely controls the timing relationship between the laser pulse duration and the detector shutter timing so as to carry out timing selection to collect Raman signals and suppress background interference.In the field of remote Raman detection,the use of time gating can effectively block the ambient light,so that the Raman spectrum to obtain excellent signal/noise ratio.This paper systematically introduces the time-gated time-sequence selective Raman technology and its applications,which focuses on the technical characteristics and prospects of picosecond time-gating.Finally,this paper introduces the first backpack-type miniaturised remote Raman spectroscopy equipment independently developed by our team in China,which can detect≤1μg within 0~2 m and typical explosives and hazardous chemicals targets≤1 mg within 13 m,and has a broad application prospect in the monitoring of industrial leakage,prevention of terrorist attacks and explosion-proof demining and other aspects of public safety warning and monitoring.