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Optical fiber chemical sensor

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Abstract

Development of an optical fiber sensing element for chemical detection requires a mechanism to transform the presence of the chemical into a physical effect that can be measured optically. In the sensor presented here this is accomplished by coating the fiber with a material which will swell, or change its dimensions, on exposure to the specific chemical. Using a simple 1-D model the change in length of such a sensing element is given by

© 1984 Optical Society of America

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