Chemical sensor by optical fiber for biomedical and biochemical sensing

Shifu Fan; Li Chen; Shongsan Xiao; Yanfang Li; Yun Li

doi:10.1117/12.417884

23 February 2001 Chemical sensor by optical fiber for biomedical and biochemical sensing

Shifu Fan, Li Chen, Shongsan Xiao, Yanfang Li, Yun Li

Proceedings Volume 4357, Distributed Fiber Optical Sensors and Measuring Networks; (2001) https://doi.org/10.1117/12.417884
Event: Distributed Fiber Optical Sensors and Measuring Networks, 2000, none, Russian Federation

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 SO₃^2- in water, respectively. The system is powered with battery, so can be used for fieldwork.

Citation Download Citation

Shifu Fan, Li Chen, Shongsan Xiao, Yanfang Li, and Yun Li "Chemical sensor by optical fiber for biomedical and biochemical sensing", Proc. SPIE 4357, Distributed Fiber Optical Sensors and Measuring Networks, (23 February 2001); https://doi.org/10.1117/12.417884

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