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Proceedings Paper

Sensitivity enhancement for evanescent wave-excited fiber optic fluorescent sensors
Author(s): Richard B. Thompson; Lynne M. Kondracki
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Paper Abstract

An important class of fiber optic sensors employs evanescent wave-excited fluorescence of labeled molecules bound to the waveguide surface to transduce a molecular recognition event, typically by an antibody. Unfortunately, the monolayer character of the sample, the small surface area, and the relatively low intensity of the evanescent wave all combine to limit sensitivity. In attempting to find a normalized frequency parameter (V number) of the optical fiber that optimized sensitivity, we found that our design (similar to those in the literature) had a loss mechanism which decreases its sensitivity and utility for remote sensing. We introduce here a design feature which addresses the loss mechanism.

Paper Details

Date Published: 1 May 1990
PDF: 7 pages
Proc. SPIE 1204, Time-Resolved Laser Spectroscopy in Biochemistry II, (1 May 1990); doi: 10.1117/12.17684
Show Author Affiliations
Richard B. Thompson, Naval Research Lab. (United States)
Lynne M. Kondracki, Geo-Centers Inc. (United States)


Published in SPIE Proceedings Vol. 1204:
Time-Resolved Laser Spectroscopy in Biochemistry II
Joseph R. Lakowicz, Editor(s)

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