Multipass acoustically open photoacoustic detector for trace gas measurements
Applied Optics, Vol. 45, Issue 11, pp. 2529-2534 (2006)
http://dx.doi.org/10.1364/AO.45.002529
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Abstract
What we believe to be a novel multipass, acoustically open photoacoustic detector designed for fast-response,
high-sensitivity detection of trace gases and pollutants in the atmosphere is
demonstrated. The acoustic pulses generated by the absorption of the light pulses of a tunable
optical parametric oscillator by target molecules are detected by an ultrasonic sensor at 40
kHz. The photoacoustic signal is enhanced by an optical multipass arrangement and by
concentration of the acoustic energy to the surface of the ultrasonic sensor. The detection
sensitivity, estimated from CO2 measurements around a
© 2006 Optical Society of America
OCIS Codes
(190.4970) Nonlinear optics : Parametric oscillators and amplifiers
(280.1120) Remote sensing and sensors : Air pollution monitoring
(280.3420) Remote sensing and sensors : Laser sensors
(300.6430) Spectroscopy : Spectroscopy, photothermal
History
Original Manuscript: June 6, 2005
Manuscript Accepted: October 28, 2005
Citation
András Miklós, Shan-Chuang Pei, and A. H. Kung, "Multipass acoustically open photoacoustic detector for trace gas measurements," Appl. Opt. 45, 2529-2534 (2006)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-45-11-2529
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