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Type: Journal article
Title: A pulsed laser source using stimulated Raman scattering and difference frequency mixing: Remote sensing of methane in air
Author: Lancaster, D.
Dawes, J.
Citation: Optics Communications, 1995; 120(5-6):307-310
Publisher: Elsevier BV
Issue Date: 1995
ISSN: 0030-4018
Statement of
D.G. Lancaster and J.M. Dawes
Abstract: Mid-infrared radiation at 3.43 μm is generated by difference frequency mixing a 1.064 μm Nd:YAG laser with a methane gas Raman shifted Nd:YAG (1.064 μm) laser at 1.54 μm in KTiOAsO₄(KTA). Using this pulsed (7 ns), moderate energy (1 mJ) source we demonstrate the optical detection of methane in air and measure an absorption coefficient of 1.2cm⁻¹ atm⁻¹. Additional source characteristics include an intrinsic wavelength stability defined by the methane Raman vibrational frequency and a moderate linewidth (1.5 cm⁻¹).
Rights: Copyright 1995 Elsevier Science B.V. All rights reserved.
DOI: 10.1016/0030-4018(95)00429-C
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