Phase modulated fiber optic gyro accommodating angular rate...

Details Phase modulated fiber optic gyro accommodating angular rate... Phase modulated fiber optic gyro accommodating angular rate...

G - Physics

01

C

G01C 19/72 (2006.01)

Patent

CA 2061904

The present invention relates to a phase modulated fiber optic gyro that accommodates angular rate reversal. The gyro is a linear phase ramp type in which clockwise and counterclockwise light beams propagate through a looped optical transmission line. A ramp signal is produced that provides each of the light beams with a ramp phase of a slope which cancels their phase difference corresponding to an input angular rate to the optical transmission line and a biasing signal which causes the phase difference between the both light beams emitted from the optical transmission line to alternate between +.pi./2 rad and -.pi./2 rad. The input angular rate is obtained on the basis of the frequency of the ramp signal.

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