Systems and methods for an intensity stabilized resonator fiber optic gyroscope

An optical intensity stabilization system for a resonator fiber optic gyroscope (RFOG), the system comprising:

• a first variable optical attenuator configured to receive a first phase modulated light beam, wherein the first phase modulated light beam is phase modulated at a first modulation frequency, fm1;
• a second variable optical attenuator configured to receive a second phase modulated light beam, wherein the second phase modulated light beam is phase modulated at a second modulation frequency, fm2;
• a resonator ring coupled to receive the first phase modulated light beam from the first variable optical attenuator, and coupled to receive the second phase modulated light beam from the second variable optical attenuator;
• a first intensity servo electrically coupled to the first variable optical attenuator, wherein the first intensity servo controls an attenuation applied by the first variable optical attenuator on the first phase modulated light beam based on an optical DC component of the first phase modulated light beam as measured from a first output of the resonator ring;
• and
• a second intensity servo electrically coupled to the second variable optical attenuator, wherein the second intensity servo controls an attenuation applied by the second variable optical attenuator on the second phase modulated light beam based on an optical DC component of the second phase modulated light beam as measured from a second output of the resonator ring.