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Proceedings Paper

Nanostructured optical fiber sensors for breathing airflow monitoring
Author(s): Y. Kang; H. Ruan; Jeffrey Mecham; Y. Wang; Francisco J. Arregui; Ignacio R. Matias; Richard O. Claus
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Paper Abstract

This paper presents recent progresses in the application of nanostructured optical fiber-based sensors for non-invasive, fast and reliable monitoring of respiratory airflow. Molecular-level self-assembly processing method is used to form multilayered inorganic nanocluster and polymer thin films on the distal ends of optical fibers to form such sensors. In order to optimize sensing performance, recent work has studies the synthesis process and the fundamental mechanisms for the change in optical reflection, specifically caused by exhaled air condensation on the coating surface. The physically small sensors fabricated by varying thin film chemistry, offer a full range of environmental relative humidity sensing from 0% to 100% with response times of microseconds, and mostly important, provide much higher sensitivity to breathing air, over 6 times larger than 100% relative humidity. The sensor performances in comparison with a medical nasal thermistor suggest such a thin film sensor an excellent device for advanced breathing airflow monitoring. All the features are appealing to clinical respiratory diagnosis and related sensor instrumentation design, and in good agreement with our analytical model.

Paper Details

Date Published: 23 May 2005
PDF: 4 pages
Proc. SPIE 5855, 17th International Conference on Optical Fibre Sensors, (23 May 2005); doi: 10.1117/12.623653
Show Author Affiliations
Y. Kang, NanoSonic Inc. (United States)
H. Ruan, NanoSonic Inc. (United States)
Jeffrey Mecham, NanoSonic Inc. (United States)
Y. Wang, Virginia Polytechnic Institute and State Univ. (United States)
Francisco J. Arregui, Univ. Publica de Navarra (Spain)
Ignacio R. Matias, Univ. Publica de Navarra (Spain)
Richard O. Claus, Virginia Polytechnic Institute and State Univ. (United States)

Published in SPIE Proceedings Vol. 5855:
17th International Conference on Optical Fibre Sensors
Marc Voet; Reinhardt Willsch; Wolfgang Ecke; Julian Jones; Brian Culshaw, Editor(s)

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