Optical fiber sensor based on the excitation of surface plasmon

Details Optical fiber sensor based on the excitation of surface plasmon Optical fiber sensor based on the excitation of surface plasmon

1990-07-16

1993-09-14

McGraw, Vincent P.

Optics: measuring and testing

Of light reflection

G01N 2155

Patent

active

052454100

ABSTRACT:
Optical fiber sensor in an external medium based on the excitation of surface plasmon comprised of a sensor head formed by a transparent body having a first flat surface provided with a thin metal layer on which the optical excitation of the surface plasmon is produced. A mirrored surface positioned perpendicular to the first flat surface and a second flat surface forming an angle .PHI. determined by the refractive indexes of the transparent body and of the external medium. The sensor emitting light to the transparent body and detecting light from the transparent body, whereby variations of the optical properties of the sensor are determined.

REFERENCES:
patent: 4844613 (1989-07-01), Batchelder et al.
patent: 4889427 (1989-12-01), Van Veen et al.
Nylander et al, "Gas Detection by Means of Surface Plasmon Resonance", Sensors and Actuators, vol. 3, pp. 79-88, 1983.
Liedberg et al, "Surface Plasmon Resonance for Gas Detection and Biosensing," Sensors and Actuators, vol. 4, pp. 299-304, 1983.
Koki Matsubara et al., Applied Optics, Mar. 15, 1988, vol. 27, No. 6, pp. 1160-1163.
L-M. Zhang, et al., Electronics Letters, Nov. 10, 1988, vol. 24, No. 23, pp. 1469-1470.
M. Matsubara et al., Applied Spectroscopy, 1988, vol. 42, No. 8, pp. 1375-1379.

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