Reducing rotation sensing errors from laser source signal and modulation cross-talk

A method comprising:

• generating a first light wave at a first carrier frequency and a first cross-talked portion at a second carrier frequency for propagation in a first direction within a fiber optic resonator, wherein a second cross-talked portion propagates in a second direction that is opposite to the first direction;
• generating a second light wave at a second carrier frequency for propagation in the second direction within the fiber optic resonator, wherein a third cross-talked portion propagates in the first direction;
• modulating the first light wave as generated with a first modulation signal that suppresses light at the first carrier frequency and the second cross-talked portion at the second carrier frequency;
• detecting the second light wave and the modulated first light wave;
• and
• determining rotation information based on the detected second light wave and the detected modulated first light wave.

A system comprising:

• a fiber optic resonator;
• a plurality of laser sources that provide light waves for propagation within the fiber optic resonator, wherein a first light wave at a first carrier frequency, a first cross-talked portion at a second carrier frequency, and a third cross-talked portion propagate in a first direction through the fiber optic resonator and a second light wave at the second carrier frequency and a second cross-talked portion propagate in a second direction through the fiber optic resonator, wherein the second direction is opposite the first direction;
• one or more modulators that modulate at least one of the first light wave and the second light wave by suppressing light at the first carrier frequency and the second cross-talked portion at the second carrier frequency;
• one or more photodetectors that produce at least one electrical signal from detecting the first light wave and the second light wave;
• and
• one or more processors that receive the at least one electrical signal from the one or more photodetectors and calculates navigation information based on information in the at least one electrical signal.