Total light loss fiber optic spectroscopy: Progress towards a fiber optic raman organic sensor

Kevin R. Kyle; Thomas M. Vess; S. Michael Angel

doi:10.1117/12.170654

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10 March 1994 Total light loss fiber optic spectroscopy: Progress towards a fiber optic raman organic sensor

Kevin R. Kyle, Thomas M. Vess, S. Michael Angel

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Proceedings Volume 2068, Chemical, Biochemical, and Environmental Fiber Sensors V; (1994) https://doi.org/10.1117/12.170654
Event: Optical Tools for Manufacturing and Advanced Automation, 1993, Boston, MA, United States

Abstract

A Raman probe has been developed utilizing a single optical fiber as both a light pipe and an active sensing element. By coating a small segment of the surface of an exposed glass fiber core with a thin polymer film, an inverted waveguide is formed where light transmitted down the fiber is stripped out of the core and into the polymer film. The polymer coating is used both as a waveguide and as a medium for concentrating small organic molecules to be interrogated by Raman spectroscopy. The ability of the fiber optic thin-film waveguide probe to detect organic vapors is demonstrated. The utility of the probe in the detection of nonaqueous phase liquids (NAPLs) is also described.

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Kevin R. Kyle, Thomas M. Vess, and S. Michael Angel "Total light loss fiber optic spectroscopy: Progress towards a fiber optic raman organic sensor", Proc. SPIE 2068, Chemical, Biochemical, and Environmental Fiber Sensors V, (10 March 1994); https://doi.org/10.1117/12.170654

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