Optics: measuring and testing – By dispersed light spectroscopy – Utilizing a spectrometer
Patent
1981-10-23
1983-12-13
McGraw, Vincent P.
Optics: measuring and testing
By dispersed light spectroscopy
Utilizing a spectrometer
G01C 1964, G01B 902
Patent
active
044202580
ABSTRACT:
A fiber-optic gyroscope designed to operate at maximum sensitivity by suping two equal-intensity input beams with a specific phase difference to the gyroscope optical coupler. When the coupler outputs into the gyroscope optical fiber coil are of equal intensity, reciprocity requires the gyroscope to operate at quadrature. This device is realized by splitting a laser beam into two paths with a phase shifter in one of the paths to control the phase shift and thereby the intensity of the beams, and coupling the light from these paths into a fiber optic coil via a four-port 3dB coupler.
REFERENCES:
patent: 4274742 (1981-06-01), Lustig
Burns William K.
Rashleigh Scott C.
Beers Robert F.
Ellis William T.
McGraw Vincent P.
The United States of America as represented by the Secretary of
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