Opt Lett. 2020 Nov 1;45(21):5925-5928. doi: 10.1364/OL.404832.
A fiber laser system for standoff detection of chemical and biological species by coherent anti-Stokes Raman scattering is presented. The system is based on an ytterbium fiber laser and a hollow-core photonic crystal fiber for generation of broadband pump/Stokes pulses. High-resolution Raman spectra encompassing the fingerprint region (600-1600) are obtained for toluene, and two simulants of chemical and biological warfare agents, specifically dimethyl methylphosphonate and sodium dipicolinate. The system is operated at standoff distances of 2 m and integration times of 8 ms. The fiber technology makes the approach suitable for implementation as a compact standoff detection and identification system.
一种基于相干反斯托克斯拉曼散射的光纤激光远程检测化学和生物物质的系统被提出。该系统基于掺镱光纤激光器和中空芯光子晶体光纤，用于产生宽带泵浦/斯托克斯脉冲。对甲苯、两种化学和生物战剂的模拟物（即甲基膦酸二甲酯和二吡啶甲酸二钠）进行了指纹区域（600-1600）的高分辨率拉曼光谱测量。该系统在 2 米的远程距离和 8 毫秒的积分时间下运行。光纤技术使得这种方法适合作为一种紧凑的远程检测和识别系统。
