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Method and apparatus for measuring pressure with embedded non-intrusive fiber optics
(United States. Patent and Trademark Office, 1995-09-19)
A method and apparatus is provided for measuring pressure in a pressure containing vessel with a non-intrusive, metal-embedded fiber optic pressure sensor. The pressure containing vessel may, for example, be the combustion ...
Apparatus and method for fiber optic intrusion sensing
(United States. Patent and Trademark Office, 1993-03-16)
Apparatus for sensing intrusion into a predefined perimeter comprises means for producing a coherent pulsed light, which is injected into an optical sensing fiber having a first predetermined length and positioned along ...
Apparatus and method for embedding optical fibers in metal
(United States. Patent and Trademark Office, 1994-02-01)
Optical fibers are embedded in metal structures and components by using a pair of stress-relieving tubes at the air-metal interface of the optical fiber.
Method and apparatus for measuring pressure with fiber optics
(United States. Patent and Trademark Office, 1998-02-03)
A method and apparatus are provided for measuring pressure in a combustion chamber of an internal combustion engine is provided with a non-intrusive, metal-embedded fiber optic pressure sensor. A Fabry-Perot Interferometer ...
Circular ring resonator distributive electromagnetic signal processor
(United States. Patent and Trademark Office, 1991-06-04)
An electromagnetic signal processor is disclosed comprising an input waveguide, an intermediate waveguide, and an output waveguide. The intermediate waveguide comprises two portions having substantially equal electromagnetic ...
Method for producing reflective taps in optical fibers and applications thereof
(United States. Patent and Trademark Office, 1990-05-08)
A method for producing reflectors in a continuous length of optical fiber is disclosed. The present process includes the steps of preparing the ends of two or more optical fibers, placing one or more of these fibers in a ...
Progressively monitorable fire alarm system
(United States. Patent and Trademark Office, 1991-02-19)
A method for producing reflectors in a continuous length of optical fiber is disclosed. The present process includes the steps of preparing the ends of two or more optical fibers, placing one or more of these fibers in a ...
Signal conditioning unit for fiber optic sensors
(United States. Patent and Trademark Office, 1996-09-17)
Apparatus and method (10, 50) for determining the value of a measurand measured by a fiber optic interferometer sensor (24, 72, 110) is provided. The apparatus includes a light source (16, 58, 102) emitting a light having ...
Method for producing reflective taps in optical fibers and applications thereof
(United States. Patent and Trademark Office, 1990-01-09)
A method for producing reflectors in a continuous length of optical fiber is disclosed. The present process includes the steps of preparing the ends of two or more optical fibers, placing one or more of these fibers in a ...
Calorimetric fiber optic chemical sensor
(United States. Patent and Trademark Office, 1992-10-20)
The present invention is directed to a sensor which utilizes an optical fiber interferometer to detect the absorption of a modulated laser beam by a particular chemical species. In particular, one embodiment of the present ...