Optical Fiber Surface Plasmon Resonance Sensor for an Aqueous Environment

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Abstract
Within last years optical waveguide sensors based on resonant excitation of surface plasmon waves have received a great deal of interest and various sensing configurations employing optical fibers [1, 2] and integrated optical waveguide [3, 4] have been realized. We report recent progress in research into surface plasmon resonance sensor utilizing a single-mode optical fiber [2] focusing on the issue of adapting the sensor for the operation in aqueous environment. It is demonstrated both theoretically and experimentally that the operation range of the sensor can be effectively tuned by employing a thin high refractive index dielectric overlayer.

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