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Proceedings Paper

Fiber optic evanescent wave (FOEW) microbial sensor for dental application
Author(s): Anil Kishen; M. Shelly John; Jun-Wei Chen; Chu Sing Lim; Xiao Hu; Anand Krishna Asundi
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Paper Abstract

In this work a new approach based on the fiber Optic Evanescent Wave (FOEW) Spectroscopy is developed for the effective determination of dental caries activity in human saliva. The biosensor design utilized the exponentially decaying wave that extends to the lower index region of the optical fiber's core-cladding interface. In order to achieve this, a short length of the cladding is removed and the fiber core surface is coated with a porous glass medium using sol-gel technique. The acidogenic profile resulting from the Streptococcus mutans activity in the human saliva is monitored using an indicator, which was encapsulated within the porous coating. These investigations display the potential benefits of FOEW based microbial sensor to monitor caries activity in human saliva.

Paper Details

Date Published: 25 October 2001
PDF: 6 pages
Proc. SPIE 4597, Biophotonics Instrumentation and Analysis, (25 October 2001); doi: 10.1117/12.446654
Show Author Affiliations
Anil Kishen, Nanyang Technological Univ. (Singapore)
M. Shelly John, Nanyang Technological Univ. (Singapore)
Jun-Wei Chen, Nanyang Technological Univ. (Singapore)
Chu Sing Lim, Nanyang Technological Univ. (Singapore)
Xiao Hu, Nanyang Technological Univ. (Singapore)
Anand Krishna Asundi, Nanyang Technological Univ. (Singapore)

Published in SPIE Proceedings Vol. 4597:
Biophotonics Instrumentation and Analysis
Arthur E. T. Chiou; Halina Podbielska; Steven L. Jacques, Editor(s)

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