Fiber optic gyroscope modulation error reduction

Details Fiber optic gyroscope modulation error reduction Fiber optic gyroscope modulation error reduction

G - Physics

01

C

G01C 19/72 (2006.01)

Patent

CA 2114149

An error control arrangement for an optical fiber rotation sensor having electromagnetic waves propagating in opposite di- rections passing through a bias optical phase modulator (19) operated by a phase modulation generator (20) both of which can contribute second harmonic distortion resulting in errors in the sensor output signal which are controlled. Control of the bias opt- ical phase modulator (19) contribution for a modulator having a piezoelectric body (30) wrapped with an optical fiber portion (40) is accomplished by mounting the body between layers (33, 35) having nonlinear stiffness.

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