Optical fiber interferometric sensors for chemical detection

Michael Alfred Butler

doi:10.1117/12.24772

1 March 1991 Optical fiber interferometric sensors for chemical detection

Michael Alfred Butler

Proceedings Volume 1368, Chemical, Biochemical, and Environmental Fiber Sensors II; (1991) https://doi.org/10.1117/12.24772
Event: SPIE Microelectronic Interconnect and Integrated Processing Symposium, 1990, San Jose, United States

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.

Citation Download Citation

Michael Alfred Butler "Optical fiber interferometric sensors for chemical detection", Proc. SPIE 1368, Chemical, Biochemical, and Environmental Fiber Sensors II, (1 March 1991); https://doi.org/10.1117/12.24772

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