Expand this Topic clickable element to expand a topic
Skip to content
Optica Publishing Group
  • 2015 European Conference on Lasers and Electro-Optics - European Quantum Electronics Conference
  • (Optica Publishing Group, 2015),
  • paper CN_2_1

Active Stand-Off Detection in the Mid-Infrared Using Broadband Femtosecond Optical Parametric Oscillators

Not Accessible

Your library or personal account may give you access

Abstract

Femtosecond optical parametric oscillators (OPOs) produce broadband mid-infrared (mid-IR) light with excellent spatial coherence and spectral brightness, making them well suited for open-path spectroscopy [1]. Here, we present some of the first examples of stand-off chemical detection using a broadband mid-IR OPO, with spectral coverage from 2700–3200 cm−1. Our principal approach employs Fourier-transform infrared (FTIR) spectroscopy, in which idler radiation from the OPO enters a scanning Michelson interferometer before being launched towards a target (Fig. 1a), typically of concrete or chemical agent resistant coating (CARC) paint. The technique has allowed us to identify the presence of both airborne chemicals (Fig. 1b, c) and liquids adhered to the target surface. The light returned from the target is typically backscattered over a 20–40° angular range, before collection by a 50-mm-diameter lens and detection on a PbSe or HgCdZnTe detector.

© 2015 IEEE

PDF Article
More Like This
Chemical Sensing Using Broadband Mid-Infrared Femtosecond Optical Parametric Oscillators

Zhaowei Zhang, Luke Maidment, Stephen Lee, Rhea J. Clewes, Christopher R. Howle, and Derryck T. Reid
JW2D.1 Adaptive Optics: Analysis, Methods & Systems (AO) 2015

Stand-Off Spectroscopy and Chemical Sensing using a Femtosecond Optical Parametric Oscillator

Zhaowei Zhang, Rhea J. Clewes, Christopher R. Howle, and Derryck T. Reid
SM4E.2 CLEO: Science and Innovations (CLEO:S&I) 2014

Stand-off Detection of Liquid Thin Films using Active Mid-Infrared Hyperspectral Imaging

Luke Maidment, Zhaowei Zhang, Christopher R. Howle, Stephen T. Lee, Allan Christie, and Derryck T. Reid
JTh2A.88 CLEO: Applications and Technology (CLEO:A&T) 2015

Select as filters


Select Topics Cancel
© Copyright 2024 | Optica Publishing Group. All Rights Reserved