Detection of CH$_{4}$ in the Mid-IR Using Difference Frequency Generation With Tunable Diode Laser Spectroscopy
Journal of Lightwave Technology, Vol. 28, Issue 10, pp. 1435-1442 (2010)
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Abstract
This paper demonstrates detection of methane using tunable diode laser spectroscopy (TDLS) through difference frequency generation (DFG) in order to address fundamental rotational-vibrational absorption lines, located around 3404 nm. Direct detection confirms that wavelength referencing of recovered lineshapes, developed for Near infra-red (Near-IR) systems, has been successfully transferred to the presented Middle infra-red (Mid-IR) system. Traditional 1f and 2 f TDLS with WMS detection regimes are also functionally confirmed analogous to their Near-IR equivalents.
© 2010 IEEE
Citation
Ian Armstrong, Walter Johnstone, Kevin Duffin, Michael Lengden, Arup Lal Chakraborty, and Keith Ruxton, "Detection of CH$_{4}$ in the Mid-IR Using Difference Frequency Generation With
Tunable Diode Laser Spectroscopy," J. Lightwave Technol. 28, 1435-1442 (2010)
http://www.opticsinfobase.org/jlt/abstract.cfm?URI=jlt-28-10-1435
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