Dynamic optical waveguide sensor

Optical waveguides – Optical waveguide sensor

Reexamination Certificate

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C385S037000

Reexamination Certificate

active

11076706

ABSTRACT:
Methods and apparatuses that sense physical parameters, such as pressure and strain, using optical waveguide sensors are described. A light source emits light at a predetermined wavelength along an optical waveguide having a fiber Bragg grating optical sensing element. That sensing element reflects light in accord with a sloped shape function of reflected light amplitude verses wavelength. A receiver converts the reflected light into electrical signals and an analyzer then determines a physical parameter based on changes of amplitude of the reflected light. The analyzer also maintains the wavelength of the light such that the wavelength corresponds to a slope wavelength of the shape function.

REFERENCES:
patent: 6016702 (2000-01-01), Maron
patent: 6422084 (2002-07-01), Fernald et al.
patent: 2003/0141440 (2003-07-01), Kim et al.
patent: 2004/0202399 (2004-10-01), Kochergin et al.
GB Search Report, Application No. 0604917.5, dated Jun. 30, 2006.

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