远程激光诱导击穿光谱技术与应用(特邀)

Remote Laser-induced Breakdown Spectroscopy and Its Application(Invited)

在冶金工业、核工业、深空探测等领域,受限于高温、强辐射等人员无法达到的极端环境限制,亟需一种可快速准确进行物质成份分析的远距离非接触式探测手段。远程激光诱导击穿光谱技术是一种结合激光远距离传输与控制以及弱光信号采集来获取目标材料物质成份信息的一种技术手段,可以实现极端环境下物质的非接触式远距离探测。本文系统介绍了远程激光诱导击穿光谱系统的光学系统结构,以及不同结构远程激光诱导击穿光谱装置的性能特点及其面临的技术瓶颈。针对远程激光诱导击穿光谱技术探测灵敏度与探测距离受限、光谱信息受限等问题,还介绍了国内外常用的远程激光诱导击穿光谱信号增强方法以及激光诱导击穿光谱与拉曼光谱结合等技术方法。最后简要总结了远程激光诱导击穿光谱技术在爆炸物探测、核工业、深空探测等几个典型领域的应用,展望了其在未来的发展。

It is necessary to develop a remote and non-contact technology for material composition analysis in metallurgy,nuclear industry and deep space exploration to protect the operator and equipment in hazardous environments from high temperature and strong radiation.The remote Laser-induced Breakdown Spectroscopy(Remote LIBS)technology is a combination of the two key technologies including the long-distance transmission and control of laser and the collection of weak spectra signals,which can be used to obtain the information of target material composition from a distance.In this review,the remote LIBS systems with different optical structures are presented.The characteristics and bottlenecks of them are also compared.To improve the detection sensitivity and distance,the signal enhancement methods for remote LIBS are summarized in this review.The combination of LIBS and Raman technology used in remote sensing is introduced too.Finally,some typical application of remote LIBS such as explosives detection,nuclear industry,deep space detection,etc.are discussed,and the development of remote LIBS in the future is prospected.