Photoacoustic monitoring of trace gases by use of a diode-based difference frequency laser source
Optics Letters, Vol. 26, Issue 20, pp. 1609-1611 (2001)
http://dx.doi.org/10.1364/OL.26.001609
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Abstract
We present a compact mid-infrared laser spectrometer for trace-gas monitoring. Difference frequency generation in periodically poled LiNbO3 is used as laser source, yielding a tuning range 3.2–3.7μm at a linewidth of 154 MHz. The relatively high average power of 3 to 5 mW favors detection with a small resonant photoacoustic gas cell. Measurements of methane yield a detection limit in the low parts in 106 by volume concentration range.
© 2001 Optical Society of America
OCIS Codes
(140.3070) Lasers and laser optics : Infrared and far-infrared lasers
(140.3600) Lasers and laser optics : Lasers, tunable
(280.1120) Remote sensing and sensors : Air pollution monitoring
(280.3420) Remote sensing and sensors : Laser sensors
(300.6260) Spectroscopy : Spectroscopy, diode lasers
(300.6430) Spectroscopy : Spectroscopy, photothermal
Citation
C. Fischer, M. W. Sigrist, Q. Yu, and M. Seiter, "Photoacoustic monitoring of trace gases by use of a diode-based difference frequency laser source," Opt. Lett. 26, 1609-1611 (2001)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-26-20-1609
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