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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 21 — Oct. 10, 2011
  • pp: 20251–20257

Quantum cascade laser based standoff photoacoustic chemical detection

Xing Chen, Liwei Cheng, Dingkai Guo, Yordan Kostov, and Fow-Sen Choa  »View Author Affiliations


Optics Express, Vol. 19, Issue 21, pp. 20251-20257 (2011)
http://dx.doi.org/10.1364/OE.19.020251


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Abstract

Standoff chemical detection with a distance of more than 41 feet using photoacoustic effect and quantum cascade laser (QCL) operated at relatively low power, less than 40 mW, is demonstrated for the first time. The option of using QCL provides the advantages of easy tuning and modulation besides the benefit of compact size, light weight and low power consumption. The standoff detection signal can be calibrated as a function of different parameters such as laser pulse energy, gas vapor concentration and detection distance. The results yield good agreements with theoretical model. Techniques to obtain even longer detection distance and achieve outdoor operations are in the process of implementation and their projection is discussed.

© 2011 OSA

OCIS Codes
(120.0280) Instrumentation, measurement, and metrology : Remote sensing and sensors
(110.5125) Imaging systems : Photoacoustics
(140.5965) Lasers and laser optics : Semiconductor lasers, quantum cascade

ToC Category:
Remote Sensing

History
Original Manuscript: August 3, 2011
Revised Manuscript: September 9, 2011
Manuscript Accepted: September 20, 2011
Published: September 30, 2011

Citation
Xing Chen, Liwei Cheng, Dingkai Guo, Yordan Kostov, and Fow-Sen Choa, "Quantum cascade laser based standoff photoacoustic chemical detection," Opt. Express 19, 20251-20257 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-21-20251


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