Being the optical type resonator gyroscope, and the methodological null optical type gyroscope in order to decrease

摘要

PROBLEM TO BE SOLVED: To provide method for determining rotational speed of an optical gyroscope (10), while reducing the resonance asymmetric errors.;SOLUTION: The gyroscope (10) includes a ring resonator (25) equipped with a hollow core optical fiber coil (24), and optical elements selected and/or oriented so as to reduce stray light which can exist within incident ray that is being introduced into the ring resonator (25). The resonator has prescribed modes. A part of the optical elements partially transmits a part of the incident ray to a 1st end (41) of the optical fiber coil (24), while partially transmitting a part of the incident ray to a filter (20). A light having specific mode is received inside the 1st end (41) of the optical fiber coil (24), and the filter (20) receives the light of incident ray which has the corresponding mode. Transmission component of circulating light indicates resonance peak of counter-propagation direction of the ring resonator (25).;COPYRIGHT: (C)2008,JPO&INPIT