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Optics Express

Optics Express

  • Editor: C. Martijn de Sterke
  • Vol. 19, Iss. 23 — Nov. 7, 2011
  • pp: 23104–23110

Calibration-free wavelength modulated TDLAS under high absorbance conditions

Peng Zhimin, Ding Yanjun, Che Lu, Li Xiaohang, and Zheng Kangjie  »View Author Affiliations


Optics Express, Vol. 19, Issue 23, pp. 23104-23110 (2011)
http://dx.doi.org/10.1364/OE.19.023104


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Abstract

Currently, the method that uses a first-order Taylor series to approximate laser transmission has seriously affected the gas concentration measurement accuracy of tunable diode laser-absorption spectroscopy (TDLAS). This paper employs a second-order Taylor series to approximate laser transmission, and a high-precision second-order algorithm has been established that can determine the gas concentration directly. Then, this algorithm is used to test the NH3 mole fraction in a cell with NH3-Air mixtures. Experimental results show that the second-order algorithm not only effectively improves the measurement accuracy of gas concentration but also greatly broadens the scope of TDLAS.

© 2011 OSA

OCIS Codes
(300.1030) Spectroscopy : Absorption
(300.6260) Spectroscopy : Spectroscopy, diode lasers

ToC Category:
Spectroscopy

History
Original Manuscript: August 31, 2011
Revised Manuscript: October 13, 2011
Manuscript Accepted: October 16, 2011
Published: October 31, 2011

Citation
Peng Zhimin, Ding Yanjun, Che Lu, Li Xiaohang, and Zheng Kangjie, "Calibration-free wavelength modulated TDLAS under high absorbance conditions," Opt. Express 19, 23104-23110 (2011)
http://www.opticsinfobase.org/oe/abstract.cfm?URI=oe-19-23-23104


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