A polarization-maintaining photonic crystal fiber optic gyroscope and its manufacturing method

Abstract

The invention discloses a polarization-maintaining photonic crystal fiber gyroscope light path. The polarization-maintaining photonic crystal fiber gyroscope light path comprises a polarization-maintaining fiber coupler, a broad band optical source, a Y waveguide, a polarization-maintaining photonic crystal fiber ring spliced with a Y waveguide output tail fiber and a detector and is characterized in that the polarization-maintaining fiber coupler acts on a polarization-maintaining fiber fast axis, a Y waveguide tail fiber is a stress birefringence polarization-maintaining fiber, 0-degree axis alignment splicing is performed between the fiber fast axis and the Y waveguide TE mode, the polarization-maintaining pohotonic crystal fiber ring is obtained by winding double macropore type polarization-maintaining photonic crystal fibers, 90-degree axis alignment splicing is performed between the axial direction of double macropore type polarization-maintaining photonic crystal fibers and the axial direction of the stress birefringence polarization-maintaining fiber, and useful signals in the gyroscope light path are all transmitted in the fast axis. The photonic crystal fiber gyroscope light path has the advantages of low temperature sensitiveness, radiation resistance and the like of a common photonic crystal fiber gyroscope, further effectively inhibits polarization errors of the gyroscope and facilitates improvement of zero-bias stability of the fiber gyroscope.

Description

technical field [0001] The invention belongs to the field of fiber optic gyroscopes, and more specifically relates to a fiber optic gyroscope optical path using a polarization-maintaining photonic crystal fiber as a sensitive ring. Background technique [0002] The fiber optic gyroscope is an inertial instrument based on the Sagnac effect. Because of its small size, light weight, wide range of precision, and no moving parts, it has been widely used in various fields such as land, sea, air, and space. As the sensitive and detection part of the Sagnac effect, the gyro optical path is the core component of the fiber optic gyro. [0003] Due to the special advantages of good radiation resistance, high temperature stability, and good bending performance, photonic crystal fibers have great application potential in the optical path of fiber optic gyroscopes. In particular, the use of photonic crystal fiber to wind the fiber ring is beneficial to improve the temperature stability ...

AI Technical Summary

Problems solved by technology

[0006] Aiming at the problem of the bias stability of the fiber optic gyroscope in the prior art, the present invention provides a polarization-maintaining photonic crystal fiber optic gyroscope, the purpose of which is to improve the bias stability of the fiber optic gyroscope and give full play to the advantages of the photonic crystal fiber optic gyroscope, thereby solving the problem of above technical issues

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