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Fiber Bragg distributed chemical sensor

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Author: Boersma, A. · Saalmink, M. · Lucassen, T. · Wiegersma, S. · Jansen, T.H. · Jansen, R. · Cheng, L.K.
Source:10th IEEE SENSORS Conference 2011, SENSORS 2011, 28-31 October 2011, Limerick, Ireland, 1480-1483
Identifier: 462820
ISBN: 9781424492886
Article number: No.: 6126995
Keywords: Materials · sensors · chemical sensors · coatings · responsive polymer coatings · Industrial Innovation · Fluid Mechanics Chemistry & Energetics · RMC - Responsive Materials & Coating PID - Process & Instrumentation Development · TS - Technical Sciences


A distributed chemical sensor is developed by coating multiple Bragg gratings in a single glass fiber with chemical responsive coatings. The composition of the coating is tuned to the target chemicals to be measured and the optical response of the coated grating is optimized by changing the coating thickness. Specific recoaters were used to apply the responsive coatings reproducibly onto the glass fibers. The coating compositions can be based on UV curing or solvent based systems. In this paper we show the development and application of a distributed gas sensor for CO 2, H 2S and H 2O that can be used for down-hole monitoring in the oil and gas industry. We have developed a toolbox for the design and modeling of the responsive polymer coatings, and the performance of the actual sensors corresponded well with the predicted behavior. © 2011 IEEE.