Systems and methods for dynamic bias offset operation in Resonator Fiber Optic Gyroscope

Sanders, Glen A, Strandjord, Lee K and Taranta, Austin (Inventors) (2018) Systems and methods for dynamic bias offset operation in Resonator Fiber Optic Gyroscope. US2018328732.

Record type: Patent

Abstract

Systems and methods for dynamic bias offset operation in RFOGs are provided. In certain embodiments, an RFOG system includes a fiber optic resonator; laser sources that launch first and second optical beams into the fiber optic resonator in opposite directions; a first servo loop configured to lock the first optical beam to a resonance frequency, the first servo loop including a modulator that modulates the first optical beam at a first resonant tracking frequency; a second servo loop configured to lock the second optical beam frequency, on average, to a resonance frequency, the second servo loop including a modulator that modulates the second optical beam at a second resonant tracking frequency, wherein the second optical beam is further modulated by a modulation frequency; and a filter configured to attenuate signals that result from the interference of the first and second optical beams.

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