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Proceedings Paper

Chemical sensor by optical fiber for biomedical and biochemical sensing
Author(s): Shifu Fan; Li Chen; Shongsan Xiao; Yanfang Li; Yun Li
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Paper Abstract

An optical fiber sensing system for biomedical and biochemical sensing was developed. The system was designed for multiparameter sensing to pH, SO2, NH3/NH4+. In the developed system, two light emitting diodes are used as light sources, a silicon photo-diode is used as light signal detector, a multimold stepped bifurcate optical fiber bundle with great aperture is used as light transmissive medium, the dyestuff is coupled to fiber by different methods. The new design idea is double beam compensation. The system is small, cheap but stable and sensitive, its response for pH is about 0.01 pH, the detective limits are 2 micrometers ol/L for NH+4 in water, 2 X 10-4 mol/L for SO32- in water, respectively. The system is powered with battery, so can be used for fieldwork.

Paper Details

Date Published: 23 February 2001
PDF: 5 pages
Proc. SPIE 4357, Distributed Fiber Optical Sensors and Measuring Networks, (23 February 2001); doi: 10.1117/12.417884
Show Author Affiliations
Shifu Fan, Tianjin Univ. (China)
Li Chen, Tianjin Univ. (China)
Shongsan Xiao, Tianjin Univ. (China)
Yanfang Li, Tianjin Univ. (China)
Yun Li, Tianjin Univ. (China)

Published in SPIE Proceedings Vol. 4357:
Distributed Fiber Optical Sensors and Measuring Networks
Yuri N. Kulchin, Editor(s)

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