Detection of thiocynate in water by fiber Bragg grating

Fiber Bragg gratings(FBG) are playing more and more vital roles in the detection of chemical, toxin, and environmental pollutants for their high efficiency, high accuracy and low cost. We present a reliable method for detection of thiocynate concentration in water using an etched Fiber Bragg Grating...

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Bibliographic Details
Main Authors: Kulkarni, V. K., Lalasangi, A. S., Bendigeri, H. H., Patil, S. B., Naik, S., Jadhav, M. S., Raikar, U. S.
Format: Conference Proceeding
Language:English
Subjects:
Bragg gratings
Cladding
Doppler effect
Pollutants
Red shift
Sensors
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Summary:Fiber Bragg gratings(FBG) are playing more and more vital roles in the detection of chemical, toxin, and environmental pollutants for their high efficiency, high accuracy and low cost. We present a reliable method for detection of thiocynate concentration in water using an etched Fiber Bragg Grating (FBG) sensor. The fabricated grating was etched to take out the cladding portion to react with surrounding region with red shift. The cladding region was etched using 40% Hydrofluoric (HF) acid solution in order to make it more sensitive. Designed sensor is more sensitive in detection of thiocynate present in water,. The sensitivity of the designed sensor is of 1.71 nm/ppm for lower concentration. The overall shift in the Bragg wavelength is of 0.06 nm from 0.2 – 1.0 ppm. The FBG based methodology has the potential for its simple design and easy to operate to be used in a sensing approach for SCN in water.
ISSN:0094-243X
1551-7616
DOI:10.1063/5.0016939