Spectroscopy of methane using a Nd:YAG laser at 134 μm
- 20 February 1992
- journal article
- Published by Optica Publishing Group in Applied Optics
- Vol. 31 (6) , 815-821
- https://doi.org/10.1364/ao.31.000815
Abstract
We present measurements of the absorption coefficient of methane in the ν2 + 2ν3 band obtained with a neodymium:yttrium aluminum garnet (Nd:YAG) laser tuned by the use of an intracavity étalon to 7472 cm−1 (1.3383 μm). The linewidth of the laser was shown to be comparable to that of the pressure-broadened methane feature while the absorption coefficient of methane at 1-atm pressure was measured to be 0.59 m−1 atm−1. These basic findings indicate that a practical methane detection system using laser radar (lidar) based on a Nd:YAG laser may be possible.Keywords
This publication has 4 references indexed in Scilit:
- Remote sensing of methane gas by differential absorption measurement using a wavelength tunable DFB LDIEEE Photonics Technology Letters, 1991
- Photoacoustic and related photothermal techniquesPhysics Reports, 1988
- Absorption measurement of ν_2 + 2ν_3 band of CH_4 at 133 μm using an InGaAsP light emitting diodeApplied Optics, 1983
- Strengths and lorentz broadening coefficients for spectral lines in the ν3 and ν2 + ν4 bands of 12CH4 and 13CH4Journal of Molecular Spectroscopy, 1983