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Proceedings Paper

Optimized configurations for mid-infrared fiber optic sensors in the marine environment
Author(s): Martin Kraft; Michael Jakusch; Boris Mizaikoff; Abraham Katzir
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Paper Abstract

As part of a European research project in the field of marine science and technology, efforts have been made to develop a portable sensor system for chlorinated hydrocarbons in seawater. This novel analytical tool for marine real-time, in- situ pollution monitoring consists of a robust, miniaturized FT-IR spectrometer in a sealed aluminum pressure vessel and a suitable fiber-optic sensor head attached to one of the container end plates. The signal generation is based on fiber evanescent wave spectroscopy, an application of the internal reflection spectroscopy principle. The sensor head is coated with a hydrophobic polymer to enrich hydrophobic analytes from the seawater matrix and to protect the fibers from corrosion by aggressive seawater constituents. This real-world application imposes a number of restrictions on the system, originating from both, engineering considerations and physico- chemical limitations. Various sensor layouts, e.g. a fiber coil, have been developed and tested in order to find a sensor head geometry with optimal sensitivity and operating stability under these harsh conditions.

Paper Details

Date Published: 10 December 1999
PDF: 9 pages
Proc. SPIE 3849, Infrared Optical Fibers and Their Applications, (10 December 1999); doi: 10.1117/12.372806
Show Author Affiliations
Martin Kraft, Vienna Univ. of Technology (Austria)
Michael Jakusch, Vienna Univ. of Technology (Austria)
Boris Mizaikoff, Vienna Univ. of Technology (United States)
Abraham Katzir, Tel Aviv Univ. (Israel)

Published in SPIE Proceedings Vol. 3849:
Infrared Optical Fibers and Their Applications
Mohammed Saad; James A. Harrington, Editor(s)

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