Ring resonator gyroscope.

摘要

A ring resonator gyroscope (10) in which the clockwise and counter-clockwise light beams are frequency shifted by an equal but opposite amount and then have their frequencies varied in antiphase relative to eachother about a mean frequency (fo + f1 or fo - f1) so any backscatter signal is at the difference frequency and hence locking at zero rate is avoided. <IMAGE>