基于色散和可调谐滤波器系统的远距离拉曼检测。

Stand-off Raman detection using dispersive and tunable filter based systems.

作者信息

Carter J Chance, Scaffidi Jon, Burnett Shana, Vasser Bryan, Sharma Shiv K, Angel S Michael

机构信息

Lawrence Livermore National Laboratory, M Division/Forensic Science Center, 7000 East Ave., L-178, Livermore, CA 94550, USA.

出版信息

Spectrochim Acta A Mol Biomol Spectrosc. 2005 Aug;61(10):2288-98. doi: 10.1016/j.saa.2005.02.028.

DOI:10.1016/j.saa.2005.02.028

PMID:15967708

Abstract

Small, transportable Raman systems are being developed for stand-off Raman measurements at intermediate ranges (e.g. <20 m) for planetary measurements. Four variations of stand-off Raman systems are described that use a small telescope for light collection that is either fiber-optic or lens-coupled to a detection system. The performance of an acousto-optic tunable filter for wavelength selection and spectral imaging is tested by comparing signal-to-noise ratio and throughput to similar measurements using a conventional spectrograph, and by measuring a variety of organic and inorganic mineral samples at distances up to 15 m. We also determine optimal ICCD gate widths for acquiring remote Raman spectra under high ambient light conditions.

摘要

小型便携式拉曼系统正在研发中，用于在中等距离（例如<20米）进行行星测量的远距离拉曼测量。本文描述了四种远距离拉曼系统的变体，它们使用小型望远镜收集光线，该望远镜通过光纤或透镜耦合到检测系统。通过将声光可调滤光器用于波长选择和光谱成像的性能与使用传统光谱仪进行的类似测量的信噪比和通量进行比较，并通过在高达15米的距离测量各种有机和无机矿物样品，对其进行了测试。我们还确定了在高环境光条件下获取远程拉曼光谱的最佳ICCD门宽。