Fiber-optic gyroscope system based on 60-micron optical fiber and optical fiber welding method

Abstract

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.

Description

technical field [0001] The invention relates to the field of optical fiber technology, in particular to an optical fiber gyroscope system based on a 60um optical fiber and an optical fiber fusion splicing method. Background technique [0002] The fiber optic gyroscope is a sensor for measuring the angular velocity of the carrier. It is mainly composed of five optical devices: an optical fiber ring, a light source, a Y waveguide, a coupler and a detector. The technology is relatively mature, and there are matching testing equipment and welding machines. With the continuous expansion of the application field of fiber optic gyroscopes, especially in the application of tactical missiles, rockets, artillery, and drones, the system has lower requirements for the accuracy of fiber optic gyroscopes, but has very high requirements for its volume. Light source, Y waveguide, Couplers, detectors and other devices, under the same performance index, have reached the limit in size, and on...

AI Technical Summary

Problems solved by technology

With the continuous expansion of the application field of fiber optic gyroscopes, especially in the application of tactical missiles, rockets, artillery, and drones, the system has lower requirements for the accuracy of fiber optic gyroscopes, but has very high requirements for its volume. Light source, Y waveguide, Couplers, detectors and other devices, under the same performance index, have reached the limit in volume, and only by optimizing the size of the fiber ring can the miniaturization of the fiber optic gyroscope be achieved.

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