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Applied Optics

Applied Optics

APPLICATIONS-CENTERED RESEARCH IN OPTICS

  • Editor: Joseph N. Mait
  • Vol. 53, Iss. 26 — Sep. 10, 2014
  • pp: 5860–5864

Spectrum sensing of trace C2H2 detection in differential optical absorption spectroscopy technique

Xi Chen and Xiaopeng Dong  »View Author Affiliations


Applied Optics, Vol. 53, Issue 26, pp. 5860-5864 (2014)
http://dx.doi.org/10.1364/AO.53.005860


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Abstract

An improved algorithm for trace C2H2 detection is presented in this paper. The trace concentration is accurately calculated by focusing on the absorption spectrum from the frequency domain perspective. The advantage of the absorption spectroscopy frequency domain algorithm is its anti-interference capability. First, the influence of the background noise on the minimum detectable concentration is greatly reduced. Second, the time-consuming preprocess of spectra calibration in the differential optical absorption spectroscopy technique is skipped. Experimental results showed the detection limit of 50 ppm is achieved at a lightpath length of 0.2 m. This algorithm can be used in real-time spectrum analysis with high accuracy.

© 2014 Optical Society of America

OCIS Codes
(300.1030) Spectroscopy : Absorption
(070.2025) Fourier optics and signal processing : Discrete optical signal processing
(280.4788) Remote sensing and sensors : Optical sensing and sensors

ToC Category:
Remote Sensing and Sensors

History
Original Manuscript: May 6, 2014
Revised Manuscript: July 25, 2014
Manuscript Accepted: July 31, 2014
Published: September 3, 2014

Citation
Xi Chen and Xiaopeng Dong, "Spectrum sensing of trace C2H2 detection in differential optical absorption spectroscopy technique," Appl. Opt. 53, 5860-5864 (2014)
http://www.opticsinfobase.org/ao/abstract.cfm?URI=ao-53-26-5860

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