Automated device for eliminating torque of polarization maintaining optical fiber

Abstract

The invention belongs to automated devices, and particularly relates to an automated device for eliminating the torque of a polarization maintaining optical fiber. The automated device for eliminating the torque of the polarization maintaining optical fiber comprises a lifting system. An optical fiber guiding system is arranged in the middle of the lifting system, a torque measuring and eliminating system and an optical fiber discharging system are arranged at the lower end of the lifting system, an optical fiber collecting system is arranged on the optical fiber discharging system, and the automated device further comprises an electrical apparatus control system. The automated device for eliminating the torque of the polarization maintaining optical fiber has the advantages that residual torque in the polarization maintaining optical fiber can be reduced effectively, the magnetic sensitivity of an optical fiber loop is directly lowered, and the magnetic field difficult problem of fiber optic gyroscopes is solved.

Description

technical field [0001] The invention belongs to an automatic device, in particular to an automatic device capable of eliminating the torque of a polarization-maintaining optical fiber. Background technique [0002] The fiber optic gyroscope is a kind of optical gyroscope, which is susceptible to the magneto-optic Faraday effect. This effect directly acts on the core component of the fiber optic gyroscope - the fiber optic ring. When the two beams of light transmitted in opposite directions are disturbed by the magnetic field, due to the There is a torque in the polarizing fiber, which will produce a phase difference, which will cause a drastic change in the zero bias of the fiber optic gyroscope, and finally affect the dynamic use accuracy of the fiber optic gyroscope. [0003] Although the method of magnetic shielding can reduce the influence of the magnetic field in the working environment of the fiber optic gyroscope on the fiber optic ring, due to the assembly and instal...

AI Technical Summary

Problems solved by technology

[0002] The fiber optic gyroscope is a kind of optical gyroscope, which is susceptible to the magneto-optic Faraday effect. This effect directly acts on the core component of the fiber optic gyroscope - the fiber optic ring. When the two beams of light transmitted in opposite directions are disturbed by the magnetic field, due to the There is a torque in the polarized fiber, which will produce a phase difference, resulting in a drastic change in the zero bias of the fiber optic gyroscope, which ultimately affects the dynamic use accuracy of the fiber optic gyroscope.

[0003] Although the method of magnetic shielding can reduce the influence of the magnetic field in the working environment of the fiber optic gyroscope on the fiber optic ring, due to the assembly and installation requirements of the fiber optic gyroscope, the design of the magnetic shield of the fiber optic gyroscope cannot be optimal, and there are the following defects:

[0004] 1) Due to space constraints, the diameter and height ratio of the magnetic shield is much larger than 1:4, which cannot avoid the "termination effect" and the penetration of magnetic lines of force into the shield;

[0005] 2) Due to space constraints, the double-layer magnetic shielding scheme cannot be used (research shows that double-layer shielding requires at least half an inch between the two layers of shielding), and the best shielding effect cannot be achieved;

[0006] 3) Due to the assembly and installation requirements of the fiber optic gyroscope, it is inevitable to open holes in the magnetic shielding body, which will inevitably cause magnetic scattering and reduce the magnetic shielding effect;

[0007] The above-mentioned defects eventually lead to a significant reduction in the magnetic shielding performance of the fiber optic gyroscope. Simply relying on the magnetic shielding method cannot reduce the magnetic sensitivity of the fiber optic gyroscope and improve the dynamic use accuracy of the fiber optic gyroscope.

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