Fiber-optic devices and sensors using fiber grating

Details Fiber-optic devices and sensors using fiber grating Fiber-optic devices and sensors using fiber grating

1994-02-15

1995-08-22

Gonzalez, Frank

Optical waveguides

With optical coupler

Particular coupling function

385 37, 385 13, G02B 626

Patent

active

054448034

ABSTRACT:
Fiber-optic devices and sensors are implemented using fiber gratings. The fiber-optic device includes the fiber grating, an input mode stripper and an output mode stripper placed at both ends of the fiber grating, to admit only one mode therethrough, and a polarizer. The fiber grating of this invention is used in combination with a directional coupler instead of a mode stripper and a polarizer. The fiber-optic device outputs desired wavelengths, a switching signal or an interference signal. An external perturbation, such as a strain, a temperature, light pulse, and etc. may be applied to the fiber grating in its preparation to change a characteristic of the fiber grating. These perturbations are actively used to make fiber-optic devices and sensors.

REFERENCES:
patent: 4881790 (1989-11-01), Mollenauer
patent: 4895421 (1990-01-01), Kim et al.
patent: 4915468 (1990-04-01), Kim et al.
patent: 5315436 (1994-05-01), Lowenhar et al.

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