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Electronic phase-tracking open-loop fiber optic gyroscope

  • US 5,438,411 A
  • Filed: 08/31/1992
  • Issued: 08/01/1995
  • Est. Priority Date: 08/31/1992
  • Status: Expired due to Term
First Claim
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1. An electronic phase-tracking open-loop fiber optic gyroscope apparatus, comprising:

  • an optical gyroscope responsive to a modulation signal for developing a phase-shifted optical signal output;

    a modulator signal source for producing the modulation signal;

    phase shift means responsive to the modulation signal for producing a reference modulation signal;

    summer means responsive to the reference modulation signal and to a feedback signal for producing a reference signal;

    signal processing means responsive to the optical signal output and the reference signal for producing a composite signal;

    means for filtering the composite signal to produce an error signal; and

    an integrator responsive to the error signal for producing and applying the feedback signal to said summer means and producing an electrical system output signal related to the phase-shift of the optical signal output.

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