Abstract
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
Original language | English |
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Pages (from-to) | 6005-6008 |
Number of pages | 4 |
Journal | Optics Letters |
Volume | 39 |
Issue number | 20 |
DOIs | |
Publication status | Published - 15 Oct 2014 |
Keywords
- FREQUENCY-COMB
- SPECTROMETER
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Derryck Telford Reid
- School of Engineering & Physical Sciences, Institute of Photonics and Quantum Sciences - Professor
- School of Engineering & Physical Sciences - Professor
Person: Academic (Research & Teaching)