Active FTIR-based stand-off spectroscopy using a femtosecond optical parametric oscillator

被引：30

作者：

Zhang, Zhaowei ^{[1
]}

Clewes, Rhea J. ^{[2
]}

Howle, Christopher R. ^{[2
]}

Reid, Derryck T. ^{[1
]}

机构：

[1] Heriot Watt Univ, Sch Engn & Phys Sci, Inst Photon & Quantum Sci, Scottish Univ Phys Alliance, Edinburgh EH14 4AS, Midlothian, Scotland

[2] Def Sci & Technol Lab, Salisbury SP4 0JQ, Wilts, England

来源：

OPTICS LETTERS | 2014年 / 39卷 / 20期

关键词：

FREQUENCY-COMB; SPECTROMETER;

D O I：

10.1364/OL.39.006005

中图分类号：

O43 [光学];

学科分类号：

070207 ; 0803 ;

摘要：

We presented the first demonstration of stand-off Fourier transform infrared (FTIR) spectroscopy using a broadband mid-infrared optical parametric oscillator, with spectral coverage over 2700-3200 cm(-1). For vapor-phase water and nitromethane (NM), stand-off spectra was recorded using a concrete target at from 1-m to 2-m range and showed good agreement with reference spectra, and in NM a normalized detection sensitivity of 15 ppm . m . Hz(-1/2) was obtained. Spectra from 50-mu L droplets of liquid thiodiglycol were detected at a stand-off distance of 2 m from aluminum, concrete and painted metal surfaces. Our results imply that OPO-based active FTIR stand-off spectroscopy is a promising new technique for the detection of industrial pollutants and the identification of chemical agents, explosives or other hazardous materials. (C) 2014 Optical Society of America

引用

页码：6005 / 6008

页数：4

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