Midinfrared fiber sensor for the in situ detection of chlorinated hydrocarbons

James Edward Walsh; Brian D. MacCraith; M. Meaney; Johannes G. Vos; F. Regan; Antonio Lancia; Vjacheslav G. Artioushenko

doi:10.1117/12.221736

29 September 1995 Midinfrared fiber sensor for the in-situ detection of chlorinated hydrocarbons

James Edward Walsh, Brian D. MacCraith, M. Meaney, Johannes G. Vos, F. Regan, Antonio Lancia, Vjacheslav G. Artioushenko

Author Affiliations +

Proceedings Volume 2508, Chemical, Biochemical, and Environmental Fiber Sensors VII; (1995) https://doi.org/10.1117/12.221736
Event: European Symposium on Optics for Environmental and Public Safety, 1995, Munich, Germany

Abstract

An infrared fiber optic sensor has been developed for the in situ detection of chlorinated hydrocarbons and other pollutant species in water. The sensing element consists of a silver halide fiber, coated with an appropriate polymer. The polymer both enriches the chemical species to be measured in the evanescent wave region of the fiber and serves to exclude water from the measurement region. Evanescent wave spectrometry is then used to accurately quantify chemical species such as chlorinated hydrocarbons which have their strongest absorption bands above 10 micrometers . In order to increase the evanescent absorbance signal, and therefore the sensitivity of the sensor, a number of novel launch designs and fiber configurations has been examined. Results from a range of such configurations are presented and conclusions are drawn regarding optimum sensor design.

Citation Download Citation

James Edward Walsh, Brian D. MacCraith, M. Meaney, Johannes G. Vos, F. Regan, Antonio Lancia, and Vjacheslav G. Artioushenko "Midinfrared fiber sensor for the in-situ detection of chlorinated hydrocarbons", Proc. SPIE 2508, Chemical, Biochemical, and Environmental Fiber Sensors VII, (29 September 1995); https://doi.org/10.1117/12.221736

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