System and method for reducing fiber optic gyroscope color noise

A fiber optic gyroscope with color noise suppression, said fiber optic gyroscope comprising:

• an electro-optic crystal phase modulator, said electro-optic crystal modulator generating a modulated signal;
• a first phase jump signal added to said modulated signal;
• a photo detector coupled to said electro-optic crystal phase modulator, said photo detector detecting said modulated signal;
• an amplifier coupled to said photo detector, said amplifier amplifying said modulated signal;
• an analog-to-digital converter, said analog-to-digital converter converting said modulated signal to a digital modulated signal;
• a phase jump amplitude and timing controller, said phase jump amplitude and timing controller generating a randomized phase jump amplitude signal, said phase jump amplitude signal being combined with said modulated signal to create a feedback signal;
• and
• wherein said feedback signal is coupled to an input of said electro-optic crystal phase modulator.

A method comprising the steps of:

• creating a plurality of phase steps for determining a rate of rotation signal in a fiber optic gyroscope;
• accumulating said plurality of phase steps to create an accumulated phase step signal;
• creating a randomized phase jump amplitude signal for enabling color noise suppression;
• and
• summing said phase jump amplitude signal with said accumulated phase step signal to create a feedback signal for said fiber optic gyroscope.

A method for suppressing color noise in a fiber optic gyroscope, said method comprising the steps of:

• providing a plurality of feedback signals for a loop closure circuit in said fiber optic gyroscope;
• selectively enabling or disabling a color noise suppression status;
• adding a phase jump amplitude signal to at least one of said plurality of feedback signals if said color noise suppression status is true, thereby altering said at least one of said plurality of feedback signals, thereby creating an altered feedback signal;
• and providing said altered feedback signal to said loop closure circuit.