Launching the excitation light to a taper externally: comprehensive performance improvement of fiber-optic evanescent-wave sensor

Huacai Chen; Jianjun Ma; Wojtek J. Bock

doi:10.1117/12.884737

17 May 2011 Launching the excitation light to a taper externally: comprehensive performance improvement of fiber-optic evanescent-wave sensor

Huacai Chen, Jianjun Ma, Wojtek J. Bock

Author Affiliations +

Proceedings Volume 7753, 21st International Conference on Optical Fiber Sensors; 775354 (2011) https://doi.org/10.1117/12.884737
Event: 21st International Conference on Optical Fibre Sensors (OFS21), 2011, Ottawa, Canada

Abstract

A taper at one end of the fiber serving as the sensing element is widely used to enhance the performance of evanescentwave (EW) fiber-optic sensors. However, almost all sensors of this type launch the excitation light into the core at the opposite end and the entire taper has to be immersed into the bulky sample volume. This paper introduces a new way of injecting excitation light: from the outside of the taper perpendicularly. As a result, several desirable features are achieved simultaneously, including a dramatic increase of collectable EW signal, elimination of stray excitation light, easy system construction and reduction of the sample volume to mere microliters.

Citation Download Citation

Huacai Chen, Jianjun Ma, and Wojtek J. Bock "Launching the excitation light to a taper externally: comprehensive performance improvement of fiber-optic evanescent-wave sensor", Proc. SPIE 7753, 21st International Conference on Optical Fiber Sensors, 775354 (17 May 2011); https://doi.org/10.1117/12.884737

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