Abstract

A theoretical method for the study of surface plasmon excitation in metallic layers, as used in fiber-optics sensors, is presented. It is based in the calculation of the propagated fields in the waveguide structure and allows us to compute the loss of optical power in the fiber (which is the measured parameter) from energy conservation considerations. The agreement with experimental data obtained with real sensors is good. The method is conceptually simple and can be adapted to different configurations of the sensors.

[IEEE ]

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Appl. Opt.

J. Lightwave Technol.

A. T. Andreev and K. P. Panajotov, "Distributed single-mode fiber to single-mode planar waveguide coupler", J. Lightwave Technol., vol. 11, pp. 1985-1989, Dec. 1993.

D. Marcuse, "Investigation of coupling between a fiber and an infinite slab", J. Lightwave Technol., vol. 7, pp. 122-130, Jan. 1989.

S. Zheng, L.-N. Binh and G. P. Simon, "Light coupling and propagation in composite optical fiber-slab waveguides", J. Lightwave Technol., vol. 13, pp. 244-251, Feb. 1995.

A. Sharma, J. Kompella and P. K. Mishra, "Analysis of fiber directional couplers and coupler half-blocks using a new simple model for single-mode fibers", J. Lightwave Technol., vol. 8, pp. 143-151, Feb. 1990.

M. S. Dinleyci and D. B. Patterson, "Vector modal solution of evanescent coupler", J. Lightwave Technol., vol. 15, pp. 2316-2324, Dec. 1997 .

Opt. Lett.

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