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Please use this identifier to cite or link to this item: http://dyuthi.cusat.ac.in/purl/2594

Title: Design and development of an LED based fiber optic evanescent wave sensor for simultaneous detection of chromium and nitrite traces in water
Authors: Suresh, Kumar P
Thomas Lee, S
Vallabhan, C P G
Nampoori, V P N
Radhakrishnan, P
Technology
Keywords: Fiber optic sensor
Electro optic devices
Fiber optic chromium sensor
Nitrite sensor
Evanescent wave
Issue Date: 2002
Publisher: Elsevier
Abstract: The design and development of a cost-effective, simple, sensitive and portable LED based fiber optic evanescent wave sensor for simultaneously detecting trace amounts of chromium and nitrite in water are presented. In order to obtain the desired performance, the middle portions of two multimode plastic clad silica fibers are unclad and are used as the sensing elements in the two arms of the sensor. Each of the sensor arms is sourced by separate super bright green LEDs, which are modulated in a time-sharing manner and a single photo detector is employed for detecting these light signals. The performance and characteristics of this system clearly establish the usefulness of the technique for detecting very low concentrations of the dissolved contaminants.
URI: http://dyuthi.cusat.ac.in/purl/2594
ISSN: 0030-4018
Appears in Collections:Dr. V P N Nampoori

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