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Proceedings Paper

Fiber optic surface plasmon resonance sensor with a Bragg grating
Author(s): Radan Slavik; Jiri Ctyroky; Jiri Homola
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Paper Abstract

We report a new optical sensor based on excitation of a surface plasmon in an optical fiber Bragg grating (FBG) structure. The sensing device consists of a side-polished single-mode optical fiber with a Bragg grating written into a fiber core and a thin gold overlayer supporting SP. If a coupling between a guided mode of the optical fiber and a SP mode is established, any change in the refractive index of analyte affects propagation constant of the fiber mode producing a change in the amount of light reflected by the FBG. A laboratory prototype of the sensor has been developed and its potential for refractometry has been examined. It has been demonstrated that the sensor's sensitivity to refractive index is as high as 750 dB/RIU.

Paper Details

Date Published: 29 December 1999
PDF: 5 pages
Proc. SPIE 4016, Photonics, Devices, and Systems, (29 December 1999); doi: 10.1117/12.373614
Show Author Affiliations
Radan Slavik, Institute of Radio Engineering and Electronics (Czech Republic)
Jiri Ctyroky, Institute of Radio Engineering and Electronics (Czech Republic)
Jiri Homola, Institute of Radio Engineering and Electronics (United States)

Published in SPIE Proceedings Vol. 4016:
Photonics, Devices, and Systems
Miroslav Hrabovsky; Pavel Tomanek; Miroslav Miler, Editor(s)

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