Fiber Optic Gyroscope Operating with Unpolarized Light Source.
DEPARTMENT OF THE NAVY WASHINGTON DC
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This patent discloses a fiber optic gyroscope comprising a Sagnac interferometer including a 3 X 3 optical directional coupler. The gyroscope is driven with an essentially unpolarized broadband spatially coherent light beam supplied by a super-luminescent diode source. A significant reduction in baseband noise occurs due to the use of the essentially unpolarized light beam.
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