Photoinscribed bragg grating sensor with a good signal-to-noise

Details Photoinscribed bragg grating sensor with a good signal-to-noise Photoinscribed bragg grating sensor with a good signal-to-noise

1996-02-01

1998-03-03

Bovernick, Rodney B.

Coherent light generators

Optical fiber laser

372102, H01S 330

Patent

active

057243719

ABSTRACT:
The present invention relates to a high capacity, high signal-to-noise ratio sensor incorporating an array of Bragg grating transducers photoinscribed on a dielectric guide and a feedback loop incorporating a wavelength selective element which is time modulated making it possible to obtain a laser sensor selectively switched by each Bragg grating.
Application to monitoring strains or temperatures in a structure.

REFERENCES:
patent: 4530097 (1985-07-01), Stokes et al.
patent: 4649529 (1987-03-01), Avicola
patent: 5189676 (1993-02-01), Wysocki et al.
patent: 5208819 (1993-05-01), Huber
patent: 5255274 (1993-10-01), Wysocki et al.
patent: 5361130 (1994-11-01), Kersey et al.
patent: 5488475 (1996-01-01), Friebele et al.
patent: 5500908 (1996-03-01), Liedenbaum et al.
Kersey et al; "Multi-Element Bragg-Grating Based Fibre-Laser Strain Sensor"; May 27, 1993;pp. 964-966; Electronics Letters vol. 29, No. 11.
Kersey et al; "Multiplexed Bragg Grating Fibre-Laser Strain-Sensor System with Mode-Locked Interrogation"; Jan. 7, 1993; pp. 112-114; Electronics Letters; vol. 29, No. 1.

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