Differential birefringent fiber frequency-modulated...

Details Differential birefringent fiber frequency-modulated... Differential birefringent fiber frequency-modulated...

G - Physics

01

C

G01C 19/72 (2006.01)

Patent

CA 2531177

Disclosed is a differential birefringent fiber frequency-modulated continuous- wave (FMCW) Sagnac gyroscope for measuring rotation velocity. The gyroscope uses a 90°-twisted single-mode birefringent fiber coil as a double unbalanced fiber-optic FMCW Sagnac interferometer, and uses the phase difference between the two beat signals from the fiber coil to determine the rotation velocity. This gyroscope can eliminate the nonreciprocal phase drift and provide a doubled resolution.

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