Single-coupler guided-wave passive resonant-ring optical-gyro instrument

摘要

A single-coupler guided-wave passive resonant-ring optical gyro system responsive to a coherent light source including: an optical-fiber resonant ring, a single directional coupler that serves as an input for exciting clockwise and counterclockwise traveling wave resonances in the resonant ring and serves as an output for extracting the ouput signals representative of those resonant traveling waves; switching means for selectively alternately applying the light waves from the coherent light source to the clockwise and counterclockwise inputs of the single directional coupler; means for separating the resonant frequencies of orthogonal polarization states of the resonant ring; means for tuning the frequency of the input light waves to the resonant frequencies of the resonant ring; and means for sensing the output signal representative of the clockwise and counterclockwise waves.