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Proceedings Article

Optical fiber remote sensing system of methane at 1645nm using wavelength-modulation technique

[+] Author Affiliations
Sanguo Li, Thomas Koscica, Yan Zhang, David Li, Hong-Liang Cui

Stevens Institute of Technology

Proc. SPIE 5995, Chemical and Biological Standoff Detection III, 59950Y (November 05, 2005); doi:10.1117/12.630688
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From Conference Volume 5995

  • Chemical and Biological Standoff Detection III
  • James O. Jensen; Jean-Marc Thériault
  • Boston, MA | October 23, 2005

abstract

This paper will demonstrate a particular one-channel optical-fiber- based CH4 gas real-time monitoring system in the mining complexes and residential area. A long-distance silica fiber link with self-design gas sensor heads has been employed in conjunction with a wavelength-tunable InGaAsP DFB laser diode at 1.64μm (around R (6) absorption peak of methane) to realize highly sensitive remote interrogation of CH4. By wavelength modulation with the DFB laser diode and a self-design processing circuit, sensitivities of less than 0.1% (volume) have been achieved.

© (2005) COPYRIGHT SPIE--The International Society for Optical Engineering. Downloading of the abstract is permitted for personal use only.
Citation

Sanguo Li ; Thomas Koscica ; Yan Zhang ; David Li and Hong-Liang Cui
"Optical fiber remote sensing system of methane at 1645nm using wavelength-modulation technique", Proc. SPIE 5995, Chemical and Biological Standoff Detection III, 59950Y (November 05, 2005); doi:10.1117/12.630688; http://dx.doi.org/10.1117/12.630688


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