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Virtual Journal for Biomedical Optics

Virtual Journal for Biomedical Optics


  • Editor: Gregory W. Faris
  • Vol. 5, Iss. 9 — Jul. 6, 2010

Fast identification of trace substance by single-photon detection of characteristic Raman scatterings with gated coincidence technique and multipixel photon counters

Guoqing Zhang, Xiaobo Hu, Ru Yang, Chunling Zhang, Kun Liang, and Dejun Han  »View Author Affiliations

Applied Optics, Vol. 49, Issue 14, pp. 2601-2605 (2010)

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We report a method for fast identification of trace substances. It is based on the single-photon detection of characteristic Raman scatterings by using a gated dual-wavelength coincidence technique and multipixel photon counters. The objective of this study is to overcome the drawback of the low-speed detection of trace substances by Raman spectroscopy and other ultraweak spectra. Analysis indicates that a trace substance in the single-molecule level can be identified within 1 ms. As an example, a fast measurement of a CCl 4 concentration with a high intrinsic peak-to-background ratio was demonstrated using this method.

© 2010 Optical Society of America

OCIS Codes
(040.1880) Detectors : Detection
(300.6450) Spectroscopy : Spectroscopy, Raman
(040.1345) Detectors : Avalanche photodiodes (APDs)

ToC Category:

Original Manuscript: January 12, 2010
Revised Manuscript: March 18, 2010
Manuscript Accepted: April 5, 2010
Published: May 4, 2010

Virtual Issues
Vol. 5, Iss. 9 Virtual Journal for Biomedical Optics

Guoqing Zhang, Xiaobo Hu, Ru Yang, Chunling Zhang, Kun Liang, and Dejun Han, "Fast identification of trace substance by single-photon detection of characteristic Raman scatterings with gated coincidence technique and multipixel photon counters," Appl. Opt. 49, 2601-2605 (2010)

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