Residual intensity modulation (RIM) control loop in a resonator fiber-optic gyroscope (RFOG)
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United States of America Patent
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May 21, 2013
Grant Date -
Sep 9, 2010
app pub date -
Oct 19, 2009
filing date -
Mar 6, 2009
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Abstract
Systems and methods for reducing intensity modulation-induced rotation rate measurement error in a resonator optical gyroscope. The method includes tapping an intensity modulated light beam, directing a portion of the tapped light beam toward a photo detector, outputting from the photo detector a signal proportional to the amplitude variation of the light beam, amplifying the signal, and then providing the signal to the intensity modulator as a control input. Intensity modulation-induced error is reduced by an amount proportional to the gain of the feedback loop.
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