Active FTIR-based standoff detection in the 3-4 micron region using broadband femtosecond optical parametric oscillators

Derryck T. Reid, Zhaowei Zhang, Christopher R. Howle

Research output: Chapter in Book/Report/Conference proceedingConference contribution

1 Citation (Scopus)

Abstract

We present the first demonstration of stand-off Fourier transform infrared spectroscopy using a broadband mid-infrared femtosecond optical parametric oscillator, with spectral coverage over 2700-3200 cm-1. Remote spectroscopy and chemical detection from 2700-3100 cm-1 is demonstrated for a thiodiglycol drop on concrete and anodized aluminum surfaces at a stand-off distance of 2 meters, as well as open-path spectroscopy of atmospheric water vapor from a concrete target at the same range. Comparison of the measured stand-off spectra with archived reference spectra for thiodiglycol and water vapor show good agreement. This technique provides greater spatial coherence and spectral brightness than a thermal source, and wider spectral coverage than a typical quantum-cascade laser, thereby presenting opportunities for application in the detection of industrial pollutants and the environmental identification of chemical warfare agents, explosives or other hazardous materials.

Original languageEnglish
Title of host publicationProceedings of SPIE - The International Society for Optical Engineering
PublisherSPIE
Volume9073
ISBN (Print)9781628410105
DOIs
Publication statusPublished - 1 Jan 2014
EventChemical, Biological, Radiological, Nuclear, and Explosives Sensing XV - Baltimore, MD, United Kingdom
Duration: 6 May 20148 May 2014

Conference

ConferenceChemical, Biological, Radiological, Nuclear, and Explosives Sensing XV
Abbreviated titleCBRNE
CountryUnited Kingdom
CityBaltimore, MD
Period6/05/148/05/14

Keywords

  • and remote detection of industrial pollutants
  • explosives or other hazardous materials
  • Fourier transform infrared spectroscopy
  • mid-infrared
  • open-path spectroscopy
  • optical parametric oscillators
  • Standoff spectroscopy

ASJC Scopus subject areas

  • Applied Mathematics
  • Computer Science Applications
  • Electrical and Electronic Engineering
  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics

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  • Cite this

    Reid, D. T., Zhang, Z., & Howle, C. R. (2014). Active FTIR-based standoff detection in the 3-4 micron region using broadband femtosecond optical parametric oscillators. In Proceedings of SPIE - The International Society for Optical Engineering (Vol. 9073). [907302] SPIE. https://doi.org/10.1117/12.2053227