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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: James C. Wyant
  • Vol. 45, Iss. 11 — Apr. 10, 2006
  • pp: 2529–2534

Multipass acoustically open photoacoustic detector for trace gas measurements

András Miklós, Shan-Chuang Pei, and A. H. Kung  »View Author Affiliations


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 2   μm wavelength, is 3.3 × 10 9   W   cm 1 .

© 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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