Evanescent wave sensor for detecting volatile organic compounds

Kisholoy Goswami; John D. Prohaska; Anil Menon; Edgar A. Mendoza; Robert A. Lieberman

doi:10.1117/12.339787

23 February 1999 Evanescent wave sensor for detecting volatile organic compounds

Kisholoy Goswami, John D. Prohaska, Anil Menon, Edgar A. Mendoza, Robert A. Lieberman

Proceedings Volume 3540, Chemical, Biochemical, and Environmental Fiber Sensors X; (1999) https://doi.org/10.1117/12.339787
Event: Photonics East (ISAM, VVDC, IEMB), 1998, Boston, MA, United States

Abstract

This work evaluates the usefulness of an intracore long period grating (LPG) structure on optical fiber for constructing a fiber-optic chemical sensor. The sensor response relies on the evanescent field interaction of core- guided light with volatile organic compounds (VOCs) surrounding the long period gratings. The LPGs were coated with proprietary chemical indicators having strong affinities for VOCs. The feasibility of this approach was tested by using representative hydrocarbons and halohydrocarbons in parts per thousand to parts per million concentrations. Test results demonstrate that LPGs offer the promise for sensitively detecting VOCs in air, water, and soil matrices.

Citation Download Citation

Kisholoy Goswami, John D. Prohaska, Anil Menon, Edgar A. Mendoza, and Robert A. Lieberman "Evanescent wave sensor for detecting volatile organic compounds", Proc. SPIE 3540, Chemical, Biochemical, and Environmental Fiber Sensors X, (23 February 1999); https://doi.org/10.1117/12.339787

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