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Proceedings Paper

Optical fiber interferometric sensors for chemical detection
Author(s): Michael Alfred Butler
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Paper Abstract

Three techniques for chemical detection are outlined which are based on the use of optical interferometric methods and permit highly sensitive detections of physical parameters. The coated-fiber interferometer concept is described in terms of an optical fiber coated with palladium that can detect hydrogen. A semitransparent metal-film sensor is then described which can be used for interferometric chemical transduction to detect chemical species. The polymer-swelling sensor is based on physical absorption such as in the use of multimode fibers with polymer films deposited on the end. Specific attention is given to the conditions for device sensitivity for the interferometric techniques presented, and the devices are shown to have selectivities that are lower than those of spectroscopic methods. The sensitivity of chemical transduction can be beneficial in a number of the measurement environments discussed.

Paper Details

Date Published: 1 March 1991
PDF: 9 pages
Proc. SPIE 1368, Chemical, Biochemical, and Environmental Fiber Sensors II, (1 March 1991); doi: 10.1117/12.24772
Show Author Affiliations
Michael Alfred Butler, Sandia National Labs. (United States)

Published in SPIE Proceedings Vol. 1368:
Chemical, Biochemical, and Environmental Fiber Sensors II
Robert A. Lieberman; Marek T. Wlodarczyk, Editor(s)

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