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Method for determination/compensation of bias errors/random walk errors induced by the light source in fiber-optic sagnac interferometers
Method for determination/compensation of bias errors/random walk errors induced by the light source in fiber-optic sagnac interferometers
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机译:确定/补偿由光纤Sagnac干涉仪中的光源引起的偏差/随机游走误差的方法
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摘要
A method for determination of/compensation for the bias/random walk errors induced by the light source in fiber-optic Sagnac interferometers employing a modulation method for stochastically independent shifting of the operating point to the points of highest sensitivity. A reference beam is output from the light beam emitted from the light source of the interferometer and passed to the fiber coil to produce a proportional reference intensity signal. Such signal is demodulated with the demodulation pattern of the rotation rate control loop to demodulate the rotation rate intensity signal (proportional to rotation rate). The demodulated reference intensity signal measures the bias/random walk errors to be determined. Demodulation of the reference intensity signal is simultaneous with that of the rotation rate intensity signal so that components of the reference and rotation rate intensity signals (each resulting from light components simultaneously emitted from the light source) are identically demodulated.
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