A resonator fiber optic gyroscope, RFOG, (100, 200), comprising: a master laser (110, 210) configured to emit a reference optical signal; a first slave laser (120, 220) configured to emit a clockwise, CW, optical signal, the first slave laser operatively coupled to the master laser and responsive to the reference optical signal through a CW optical phase lock loop; a second slave laser (130, 230) configured to emit a counter-clockwise, CCW, optical signal, the second slave laser operatively coupled to the master laser and responsive to the reference optical signal through a CCW optical phase lock loop; and an optical resonator ring cavity (102, 202) in optical communication with the first slave laser and the second slave laser, the optical resonator ring cavity configured to receive the CW optical signal and the CCW optical signal; a feedback laser stabilization loop (140, 240) for the master laser including a common modulation frequency scheme; wherein the resonator ring cavity is configured to direct a reflected optical signal to the feedback laser stabilization loop; wherein the feedback laser stabilization loop is configured to lock a frequency of the reference optical signal from the master laser onto a resonance frequency of the resonator ring cavity with a fixed frequency offset, the feedback laser stabilization loop being configured to determine the fixed frequency offset by a relative frequency between the optical signal of the first slave laser or the second slave laser, and the reference optical signal of the master laser, characterised in that: the optical resonator ring cavity is configured to receive the CW optical signal and the CCW optical signal without receiving the reference optical signal; and the feedback laser stabilization loop is configured to indirectly lock the frequency of the reference optical signal from the master laser onto the resonance frequency of the resonator ring cavity. a master laser (110, 210) configured to emit a reference optical signal; a first slave laser (120, 220) configured to emit a clockwise, CW, optical signal, the first slave laser operatively coupled to the master laser and responsive to the reference optical signal through a CW optical phase lock loop; a second slave laser (130, 230) configured to emit a counter-clockwise, CCW, optical signal, the second slave laser operatively coupled to the master laser and responsive to the reference optical signal through a CCW optical phase lock loop; and an optical resonator ring cavity (102, 202) in optical communication with the first slave laser and the second slave laser, the optical resonator ring cavity configured to receive the CW optical signal and the CCW optical signal; a feedback laser stabilization loop (140, 240) for the master laser including a common modulation frequency scheme; wherein the resonator ring cavity is configured to direct a reflected optical signal to the feedback laser stabilization loop; wherein the feedback laser stabilization loop is configured to lock a frequency of the reference optical signal from the master laser onto a resonance frequency of the resonator ring cavity with a fixed frequency offset, the feedback laser stabilization loop being configured to determine the fixed frequency offset by a relative frequency between the optical signal of the first slave laser or the second slave laser, and the reference optical signal of the master laser, characterised in that: the optical resonator ring cavity is configured to receive the CW optical signal and the CCW optical signal without receiving the reference optical signal; and the feedback laser stabilization loop is configured to indirectly lock the frequency of the reference optical signal from the master laser onto the resonance frequency of the resonator ring cavity. the optical resonator ring cavity is configured to receive the CW optical signal and the CCW optical signal without receiving the reference optical signal; and the feedback laser stabilization loop is configured to indirectly lock the frequency of the reference optical signal from the master laser onto the resonance frequency of the resonator ring cavity.