Fiber Bragg Granting Sensor for Detection of Nitrate Concentration in Water

Lalasangi , A.S. and Akki, J.F. and Manohar, K.G. and Srinivas, T. and Radhakrishnan, P. and Kher, Sanjay and Singh, Nahar and Raikar, U.S. (2011) Fiber Bragg Granting Sensor for Detection of Nitrate Concentration in Water. Sensors & Transducers, 125 (2). pp. 187-193. ISSN 1726-5479

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Abstract

The concentrations of chemical species in drinking water are of great interest. We demonstrated etched fiber Bragg grating (FBG) as a concentration sensor for nitrate by analyzing the Bragg wavelength shift with concentration of chemical solution. The FBG is fabricated by phase mask technique on single mode Ge-B co-doped photosensitive fiber. Sensitivity of FBGs to the surrounding solution concentration can be enhanced by reducing diameter of the cladding with 40 % HF solution. The maximum sensitivity achieved is 1.322  10-3 nm/ppm. The overall shift of Bragg wavelength is of the order of 6.611  10-2 nm for 10 to 50 ppm concentration. Copyright © 2011 IFSA.

Item Type: Article
Subjects: CSIO > Photonics Instrumentation
Depositing User: Ms T Kaur
Date Deposited: 22 Jan 2012 14:20
Last Modified: 11 Apr 2012 11:18
URI: http://csioir.csio.res.in/id/eprint/12

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