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Optical Engineering

Fiber optic evanescent field absorption sensor: effect of launching condition and the geometry of the sensing region
Author(s): Banshi Dhar Gupta; Chandra Deep Singh; Anurag Sharma
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Paper Abstract

Fiber optic evanescent wave absorption sensors based on four different designs are described. The launching condition and the geometry of the sensing region are found to be the main parameters that can influence the sensitivity of the sensor. High sensitivity is achieved by launching the selected rays into the fiber having tapered sensing regions. The experimental results obtained are qualitatively explained using a simple model based on meridional rays.

Paper Details

Date Published: 1 June 1994
PDF: 5 pages
Opt. Eng. 33(6) doi: 10.1117/12.167173
Published in: Optical Engineering Volume 33, Issue 6
Show Author Affiliations
Banshi Dhar Gupta, Indian Institute of Technology (India)
Chandra Deep Singh, Indian Institute of Technology (India)
Anurag Sharma, Indian Institute of Technology/Delhi (India)

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