Affordable Access

Publisher Website

Design and development of an LED based fiber optic evanescent wave sensor for simultaneous detection of chromium and nitrite traces in water

Authors
Journal
Optics Communications
0030-4018
Publisher
Elsevier
Publication Date
Volume
214
Identifiers
DOI: 10.1016/s0030-4018(02)02146-6
Keywords
  • Fiber Optic Sensor
  • Electro Optic Devices
  • Fiber Optic Chromium Sensor
  • Nitrite Sensor
  • Evanescent Wave
Disciplines
  • Design

Abstract

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.

There are no comments yet on this publication. Be the first to share your thoughts.