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Proceedings Paper

Fiber-based optical Fabry-Pérot gas sensor for fast and on-column detection
Author(s): Jing Liu; Yuze Sun; Greg Frye-Mason; Aaron K. Thompson; Shiou-jyh Ja; Xudong Fan
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Paper Abstract

A versatile, compact, and sensitive fiber-based optical Fabry-Pérot (FP) gas sensor is reported in this paper. The sensor probe is composed of a silver layer and a vapor-sensitive polymer layer that are deposited on the cleaved fiber endface to form an FP cavity sequentially. The interference spectrum generated from the reflected light at the silver-polymer and polymer-air interfaces changes upon the absorption of gas analytes. This structure enables using polymer of any refractive index (RI) as the sensing layer, which significantly enhances the sensor versatility. Two polymers of polyethylene glycol (PEG) 400 (RI=1.465-1.469) and Norland Optical Adhesive (NOA) 81 (RI=1.53-1.56) are used as the gas sensing polymer to demonstrate the feasibility of the FP sensor, and show drastically different sensor response to various gas analytes. In addition, we assemble the FP sensor with a short fused silica capillary into a sensor module, and employ it in the gas chromotgraphy (GC) system to investigate its capability as a GC detector for rapid on-column detection.

Paper Details

Date Published: 11 February 2010
PDF: 6 pages
Proc. SPIE 7604, Integrated Optics: Devices, Materials, and Technologies XIV, 760413 (11 February 2010); doi: 10.1117/12.839620
Show Author Affiliations
Jing Liu, Univ. of Missouri, Columbia (United States)
Yuze Sun, Univ. of Missouri, Columbia (United States)
Greg Frye-Mason, Consultant (United States)
Aaron K. Thompson, ICx Nomadics, Inc. (United States)
Shiou-jyh Ja, ICx Nomadics, Inc. (United States)
Xudong Fan, Univ. of Missouri, Columbia (United States)

Published in SPIE Proceedings Vol. 7604:
Integrated Optics: Devices, Materials, and Technologies XIV
Jean-Emmanuel Broquin; Christoph M. Greiner, Editor(s)

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