DocumentCode :
1418854
Title :
Detection of CH 
in the Mid-IR Using Difference Frequency Generation With Tunable Diode Laser Spectroscopy
Author :
Armstrong, Ian ; Johnstone, Walter ; Duffin, Kevin ; Lengden, Michael ; Chakraborty, Arup Lal ; Ruxton, Keith
Author_Institution :
Dept. of Electron. & Electr. Eng., Univ. of Strathclyde, Glasgow, UK
Volume :
28
Issue :
10
fYear :
2010
fDate :
5/15/2010 12:00:00 AM
Firstpage :
1435
Lastpage :
1442
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.
Keywords :
carbon compounds; chemical variables measurement; measurement by laser beam; optical harmonic generation; CH4; difference frequency generation; middle infra-red system; near infra-red systems; rotational-vibrational absorption lines; tunable diode laser spectroscopy; wavelength 3404 nm; wavelength referencing; Difference frequency generation; nonlinear optics; spectral analysis; tunable diode laser spectroscopy; wavelength measurement;
fLanguage :
English
Journal_Title :
Lightwave Technology, Journal of
Publisher :
ieee
ISSN :
0733-8724
Type :
jour
DOI :
10.1109/JLT.2010.2042789
Filename :
5415578
Link To Document :
