Gupta N, Dahmani R
Army Research Laboratory, Adelphi, MD 20783-1197, USA.
Spectrochim Acta A Mol Biomol Spectrosc. 2000 Jul;56A(8):1453-6. doi: 10.1016/s1386-1425(99)00265-6.
A spectrometer based on acousto-optic tunable filters is developed for use in measuring Raman spectra as part of a detection system that is low-cost, reliable, and field-portable. The system is coupled with a fiber optic bundle to carry the excitation laser light to the sample and to collect the Raman scattered light. Spectra of the explosives trinitrotoluene (TNT), cyclotrimethylenetrinitramine (RDX), cyclotetramethylenetetranitramine (HMX) and nitroguanidine (NQ) were obtained in very short times and are in good agreement with those taken with conventional Fourier transform Raman spectrometers. Spectra of mixtures of explosives were also obtained and show no overlap of their characteristic Raman bands.
开发了一种基于声光可调谐滤波器的光谱仪，用于测量拉曼光谱，作为低成本、可靠且便于携带到现场的检测系统的一部分。该系统与光纤束耦合，将激发激光束传输到样品并收集拉曼散射光。在极短时间内获得了炸药三硝基甲苯（TNT）、环三亚甲基三硝胺（RDX）、环四亚甲基四硝胺（HMX）和硝基胍（NQ）的光谱，且与传统傅里叶变换拉曼光谱仪所测光谱吻合良好。还获得了炸药混合物的光谱，其特征拉曼谱带未出现重叠。
