Radiant energy – Photocells; circuits and apparatus – Optical or pre-photocell system
Patent
1996-02-02
1997-06-24
Le, Que
Radiant energy
Photocells; circuits and apparatus
Optical or pre-photocell system
25022724, 385 28, H01J 516
Patent
active
056419562
ABSTRACT:
An optical waveguide sensor arrangement for sensing at least one physical parameter is provided. This arrangement comprises an optical waveguide having guided modes, lossy non-guided modes, and a long period grating coupling the guided modes to the lossy non-guided modes wherein the long period grating produces a wavelength transmission spectrum functionally dependent on the physical parameter sensed. A source means provides light to the optical waveguide sensor and an optoelectronic detector, which is positioned in an operable relationship to the optical waveguide sensor, detects light transmitted through the optical waveguide sensor. Lastly, a processing means is attached to the optoelectronic detector for correlating the wavelength transmission spectrum with a numerical value for the physical parameter sensed. The physical parameters sensed by the optical waveguide sensor include: temperature, strain, shape, refractive index and corrosion.
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Bhatia Vikram
Greene Jonathan A.
Murphy Kent A.
Vengsarkar Ashish M.
Bryant Joy L.
F&S, Inc.
Le Que
Lucent Technologies
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