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SYSTEMS AND METHODS FOR RESONATOR FIBER OPTIC GYROSCOPE INTENSITY MODULATION CONTROL

  • US 20100253948A1
  • Filed: 03/23/2010
  • Published: 10/07/2010
  • Est. Priority Date: 04/01/2009
  • Status: Active Grant
First Claim
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1. A resonant fiber optic gyroscope (RFOG) having a residual intensity modulation (RIM) controller, the controller comprising:

  • an intensity modulator optically coupled to receive a light beam from a laser source modulated at a resonance detection modulation frequency;

    an optical tap device optically coupled to the intensity modulator; and

    a feedback servo coupled to the optical tap device and the intensity modulator, the demodulating feedback servo generating a sinusoidal feedback signal to the intensity modulator;

    wherein the feedback servo adjusts an amplitude and phase of the sinusoidal feedback signal provided to intensity modulator based on a residual intensity modulation detected by the demodulating feedback servo.

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