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

Sanguo Li; Thomas Koscica; Yan Zhang; David Li; Hong-Liang Cui

doi:10.1117/12.630688

5 November 2005 Optical fiber remote sensing system of methane at 1645nm using wavelength-modulation technique

Sanguo Li, Thomas Koscica, Yan Zhang, David Li, Hong-Liang Cui

Proceedings Volume 5995, Chemical and Biological Standoff Detection III; 59950Y (2005) https://doi.org/10.1117/12.630688
Event: Optics East 2005, 2005, Boston, MA, United States

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.

Citation Download 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 (5 November 2005); https://doi.org/10.1117/12.630688

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