Porous capillary tubing waveguide for multigas sensing
Optics Letters, Vol. 35, Issue 3, pp. 315-317 (2010)
http://dx.doi.org/10.1364/OL.35.000315
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Abstract
This Letter reports simultaneous acetylene and carbon monoxide gas sensing by using a porous hollow-core waveguide. Compared to evanescent wave based gas sensors, the hollow-core waveguide can have a much better sensitivity because the majority of the light-wave energy propagating in the hollow core can interact directly with the gas molecules. The wall of the waveguide is made porous by the phase separating and leaching of the initial glass tubing. This allows the gas molecules to easily penetrate into the sensor providing the sensor with a very fast response time compared to other waveguide based gas sensors. A gas chamber system was constructed to simultaneously measure the presence of acetylene and carbon monoxide gases, and the testing results clearly indicate the high sensitivity and fast response time of this sensor.
© 2010 Optical Society of America
OCIS Codes
(060.2270) Fiber optics and optical communications : Fiber characterization
(060.2280) Fiber optics and optical communications : Fiber design and fabrication
(060.2290) Fiber optics and optical communications : Fiber materials
(060.2340) Fiber optics and optical communications : Fiber optics components
(060.2370) Fiber optics and optical communications : Fiber optics sensors
(300.1030) Spectroscopy : Absorption
ToC Category:
Fiber Optics and Optical Communications
History
Original Manuscript: September 16, 2009
Revised Manuscript: December 3, 2009
Manuscript Accepted: December 4, 2009
Published: January 25, 2010
Citation
Cheng Ma, Brian Scott, Gary Pickrell, and Anbo Wang, "Porous capillary tubing waveguide for multigas sensing," Opt. Lett. 35, 315-317 (2010)
http://www.opticsinfobase.org/ol/abstract.cfm?URI=ol-35-3-315
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