The invention discloses a
fiber-optic
gyroscope system based on a 60-micron
optical fiber and an
optical fiber welding method. According to the invention, a sensitive
optical fiber ring formed by winding 60 optical fibers is used and a set of high-precision
fiber-optic
gyroscope is built, wherein the size of the
fiber-optic ring is phi 96.5 * phi 109.5 * 16.5 (the inner
diameter * the outer
diameter * the thickness), the length of the fiber-optic ring is about 3400 m, and the theoretical precision of the fiber-optic ring can reach 0.0005 degree / h compared with an 80 fiber-optic ring (2500 m) with the same volume. A
light source with a
tail fiber of 80 or 125, a Y
waveguide, a coupler and a
detector are continuously used, and the solution to a problem of
welding matching of a 60 optical
fiber ring and the 80
waveguide is the key. An FSM-100P polarization-maintaining
welding machine from the Fujikura and an ERM-102
extinction ratio tester of a GP company are used for manually aligning and welding 60 optical fibers and 80
waveguide fibers, the
extinction ratio of the 60 optical fibers and the 80 waveguide fibers is tested, and the
extinction ratio is compared with an extinction ratioof 80 optical fiber rings and 80 waveguide fibers. Connection of the whole fiber-optic
gyroscope system is completed, and the zero-bias stability of the fiber-optic gyroscope
system is tested. According to the invention, the matching problem of 60 optical fiber and 80 optical fiber devices is solved, and the selection of devices for manufacturing gyroscopes is more flexible.