Fiber optic evanescent wave (FOEW) microbial sensor for dental application

Anil Kishen; M. Shelly John; Jun-Wei Chen; Chu Sing Lim; Xiao Hu; Anand Krishna Asundi

doi:10.1117/12.446654

25 October 2001 Fiber optic evanescent wave (FOEW) microbial sensor for dental application

Anil Kishen, M. Shelly John, Jun-Wei Chen, Chu Sing Lim, Xiao Hu, Anand Krishna Asundi

Proceedings Volume 4597, Biophotonics Instrumentation and Analysis; (2001) https://doi.org/10.1117/12.446654
Event: International Symposium on Photonics and Applications, 2001, Singapore, Singapore

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.

Citation Download Citation

Anil Kishen, M. Shelly John, Jun-Wei Chen, Chu Sing Lim, Xiao Hu, and Anand Krishna Asundi "Fiber optic evanescent wave (FOEW) microbial sensor for dental application", Proc. SPIE 4597, Biophotonics Instrumentation and Analysis, (25 October 2001); https://doi.org/10.1117/12.446654

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