Optical resonator gyro and method for reducing resonance asymmetry errors

摘要

Methods and apparatus are provided for attenuating rotation rate errors in a resonator gyro (10). The gyro (10) includes a ring resonator (25) having a hollow core optical fiber coil (24) and optical elements that are selected and/or oriented to reduce stray light that may be present in input light beams introduced to the ring resonator (25). The resonator has a predetermined mode. One of the optical elements partially transmits a portion of the input light beam to a first end (41) of the fiber coil (24) while partially transmitting a portion of the input light beam to a filter (20). Light having the predetermined mode is accepted into the first end (41) of the fiber coil (24), and the filter (20) accepts light of the input light beam having a corresponding mode. Transmission components of the circulating light beams indicates resonance peaks of the counter-propagating directions of the ring resonator (25).