Optical fiber gyroscope

The invention discloses an optical fiber gyroscope which comprises a ring coupler and a sensing ring, the ring coupler is coupled with an input optical fiber and two output optical fibers, namely an output optical fiber a andoutput optical fibers b, and the sensing ring is formed by winding the output optical fibers; the optical fiber gyroscope further comprises a heat insulation magnetic shielding box, a micropore is formed in the shielding box, and the ring coupler and the sensing ring are arranged in the magnetic shielding box; and the input optical fiber penetrates out of the shielding box through the micropore and is connected to the rest part of the optical fiber gyroscope. The middle point of the optical fiber of the sensing ring is located on the outer side of the optical fiber ring, and the two tail ends of the sensing ring are located on the inner side of the sensing ring, so that the Shupe effect caused by rapid change of external environment parameters such as temperature can be effectively reduce