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Proceedings Paper

Optical fiber sensors for breathing diagnostics
Author(s): Q. Chen; Richard O. Claus; Jeffrey B. Mecham; M. Vercellino; Francisco J. Arregui; Ignacio R. Matias
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Paper Abstract

We report the application of an optical fiber-based humidity sensor to the problem of breathing diagnostics. The sensor is fabricated by molecularly self-assembling selected polymers and functionalized inorganic nanoclusters into multilayered optical thin films on the cleaved and polished flat end of a singlemode optical fiber. Prior work has studied the synthesis process and the fundamental mechanisms responsible for the change in optical reflection from the film that occurs as a function of humidity. We will briefly review that prior work as a way to introduce more recent developments. This paper will then discuss the application of these sensors to the analysis of air flow. We have designed the sensor thin film materials for the detection of relative humidity over a wide range, from approximately 10 to 95%, and for response times as short as several tens of milliseconds. This very fast response time allows the near real-time analysis of air flow and humidity during a single breath, with the advantage of very small size.

Paper Details

Date Published: 26 March 2002
PDF: 7 pages
Proc. SPIE 4616, Optical Fibers and Sensors for Medical Applications II, (26 March 2002); doi: 10.1117/12.463815
Show Author Affiliations
Q. Chen, Virginia Polytechnic Institute and State Univ. (United States)
Richard O. Claus, NanoSonic, Inc. and Virginia Polytechnic Institute and State Univ. (United States)
Jeffrey B. Mecham, NanoSonic, Inc. (United States)
M. Vercellino, NanoSonic, Inc. (United States)
Francisco J. Arregui, Univ. Publica de Navarra (Spain)
Ignacio R. Matias, Univ. Publica de Navarra (Spain)

Published in SPIE Proceedings Vol. 4616:
Optical Fibers and Sensors for Medical Applications II
Israel Gannot, Editor(s)

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