Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1994-04-05
1996-01-23
Turner, Samuel A.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
385 14, G01C 1922
Patent
active
054869218
ABSTRACT:
A fiber optic rotation sensor includes a [3.times.3] optical coupler formed of first, second and third optical waveguides. The first, second and third optical waveguides are formed such that the fractions of light coupled from any one of the first, second and third optical waveguides to the other two optical waveguides are constant, independent of thermally-induced changes in the interaction length. An optical signal source provides an input optical signal to the first optical waveguide such that portions of the input optical signal are coupled from the first optical waveguide into the second and third optical waveguides. The optical fiber in which the sensing loop is formed has ends that are coupled to the second and third optical waveguides to receive optical signals that form counterpropagating optical waves in a fiber optic sensing loop and to combine the counterpropagating optical waves after they have traversed the sensing loop.
REFERENCES:
patent: 4264126 (1981-04-01), Sheem
patent: 4440498 (1984-04-01), Sheem
patent: 4479715 (1984-10-01), Sheem
patent: 4944590 (1990-07-01), Poisel et al.
patent: 5037204 (1991-08-01), Poisel et al.
patent: 5195151 (1993-03-01), Campbell, Jr. et al.
Litton Systems Inc.
Turner Samuel A.
LandOfFree
Optimum coupler configuration for fiber optic rate gyroscope usi does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Optimum coupler configuration for fiber optic rate gyroscope usi, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Optimum coupler configuration for fiber optic rate gyroscope usi will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1508694