Optics: measuring and testing – By light interference – Rotation rate
Reexamination Certificate
2009-08-12
2011-12-27
Chowdhury, Tarifur (Department: 2886)
Optics: measuring and testing
By light interference
Rotation rate
C356S459000, C356S460000
Reexamination Certificate
active
08085407
ABSTRACT:
Systems and methods for optimizing input beam modulation for high gyro sensitivity and low bias errors. The present invention is a resonator optical gyroscope having an optimized phase-modulation amplitude (frequency) for a selected modulation frequency (amplitude) that maximizes the gyro signal-to-noise (S/N) sensitivity. For selected values of the phase modulation amplitude, the polarization cross-coupling induced intensity modulation can be nulled. By setting the phase modulation amplitudes substantially close to these nulling points (e.g. M=3.832 or 7.016 radians, which causes the first order Bessel function to be zero J1(M)=0) and then optimizing the modulation frequency, the intensity modulation induced bias is reduced to zero and gyro S/N sensitivity is maximized.
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European Patent Office, “European Search Report”, Apr. 7, 2011, Published in: EP.
Qiu Tiequn
Sanders Glen A.
Strandjord Lee
Chowdhury Tarifur
Fogg & Powers LLC
Honeywell International , Inc.
Lapage Michael P
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