Path length control signal derivation circuit for a laser angular rate sensor
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United States of America Patent
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Nov 1, 1988
Grant Date -
N/A
app pub date -
Feb 9, 1987
filing date -
Feb 9, 1987
priority date (Note) -
Expired
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Abstract
Electro-optical apparatus for the control of the optical path length in a laser angular rate sensor. An output of a fringe detector dual photodiode and preamplifier, normally present, is processed to recover a laser intensity component present as an amplitude modulation superimposed on the phase-modulated fringe detector signal. The laser intensity component is then provided as an input to the optical path length feedback control system.
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