Spectroscopy Of Fluids Using Evanescent Wave Absorption On Multimode Fiber

V. Ruddy; B. MacCraith; J. A. Murphy

doi:10.1117/12.963176

13 February 1990 Spectroscopy Of Fluids Using Evanescent Wave Absorption On Multimode Fiber

V. Ruddy, B. MacCraith, J. A. Murphy

Author Affiliations +

Proceedings Volume 1172, Chemical, Biochemical, and Environmental Fiber Sensors; (1990) https://doi.org/10.1117/12.963176
Event: OE/FIBERS '89, 1989, Boston, United States

Abstract

Evanescent wave spectroscopy at the surface of the core of a section of multimode plastic clad silica (PCS) fiber located centrally along a length of fiber is described. High sensitivity is achieved by the launching of tunneling modes. The absorbance of Methylene Blue is found to vary linearly with the exposed length of fiber core and to show a square root dependence on solution concentration over two orders of magnitude of the latter. This is attributed to adsorption of the dye on the surface of the fiber core.

Citation Download Citation

V. Ruddy, B. MacCraith, and J. A. Murphy "Spectroscopy Of Fluids Using Evanescent Wave Absorption On Multimode Fiber", Proc. SPIE 1172, Chemical, Biochemical, and Environmental Fiber Sensors, (13 February 1990); https://doi.org/10.1117/12.963176

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