Share Email Print
cover

Proceedings Paper

Fiber optic ammonia gas sensor utilizing surface plasmon resonance of copper/bromocresol purple thin films
Author(s): Satyendra K. Mishra; Shivani Bhardwaj; Banshi D. Gupta
Format Member Price Non-Member Price
PDF $14.40 $18.00

Paper Abstract

We present an experimental study of fiber optic ammonia gas sensor based on the phenomena of surface plasmon resonance working on wavelength modulation scheme. The principle of the sensor is based on the change in dielectric constant of the bromocresol purple (BCP) in the presence of ammonia gas. The sensor works at room temperature. Two different kinds of coating configurations have been considered, namely copper + BCP and silver + BCP, on the unclad portion of the fiber. The experiments have been carried out at the low concentrations (1 ppm − 10 ppm) of ammonia gas around the probe. The sensor with copper and BCP layers has greater sensitivity than sensor with silver and BCP layers. The proposed sensor has small response and recovery times.

Paper Details

Date Published: 20 May 2013
PDF: 6 pages
Proc. SPIE 8794, Fifth European Workshop on Optical Fibre Sensors, 87941G (20 May 2013); doi: 10.1117/12.2026064
Show Author Affiliations
Satyendra K. Mishra, Indian Institute of Technology Delhi (India)
Shivani Bhardwaj, Indian Institute of Technology Delhi (India)
Banshi D. Gupta, Indian Institute of Technology Delhi (India)


Published in SPIE Proceedings Vol. 8794:
Fifth European Workshop on Optical Fibre Sensors
Leszek R. Jaroszewicz, Editor(s)

© SPIE. Terms of Use
Back to Top