Digital synthetic serrodyne for fiber optic gyroscope

Details Digital synthetic serrodyne for fiber optic gyroscope Digital synthetic serrodyne for fiber optic gyroscope

G - Physics

01

C

345/10, 354/97

G01C 19/72 (2006.01)

Patent

CA 2020379

A digital synthetic serrodyne phase difference controller for a rotation sensor capable of sensing rotation about an axis of an optical fiber coil based on having a pair of electromagnetic waves propagating through the optical fiber in opposite directions to both impinge on a photodetector with a phase difference relationship therebetween, the digital synthetic serrodyne phase difference controller including a positive serrodyne generator and a negative serrodyne generator having outputs which input to a common adder. The bit output of the adder is converted to analog in a digital-to-analog converter and applied to operate a frequency translating device in the optical path with the coil.

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