Three-axis integrated satellite-borne fiber-optic gyroscope light path

Abstract

The invention relates to the technical field of optical paths of fiber-optic gyroscopes and particularly relates to a three-axis integrated satellite-borne fiber-optic gyroscope optical path. The three-axis integrated satellite-borne fiber-optic gyroscope optical path comprises two light sources, five 1*3 optical fiber couplers, three Y waveguides, three optical fiber rings and three detectors, the two light sources comprise a main light source and a backup light source; the two light sources are respectively welded with a single tail fiber port of one 1*3 optical fiber coupler; the couplers divide an optical signal into three paths; optical signals are respectively provided for three sensitive shafts of a gyroscope; each sensitive shaft comprises a 1*3 optical fiber coupler, a Y waveguideand an optical fiber ring; the Y waveguide and the optical fiber ring form a sensitive loop of each axis gyroscope; the 1*3 optical fiber coupler realizes the light splitting of an interference signal carrying Sagnac phase shift information, the split interference light signals are detected by the detectors, a key device-light source in the light path adopts double-light-source backup, and the light path has no single-point fault and has relatively high reliability.

Description

technical field [0001] The invention relates to the technical field of optical fiber gyro optical path, in particular to a three-axis integrated spaceborne optical fiber gyroscope optical path. Background technique [0002] Fiber optic gyro is an inertial instrument based on the Sagnac effect. It has the advantages of small size, light weight, wide range of accuracy, and no moving parts. In recent years, its application in the field of satellite aerospace has attracted increasing attention. The optical path of the gyro is the core part of the fiber optic gyro, and it is the most important sensitive and detection part of the Sagnac effect. Low power consumption, high reliability, small size and light weight are important features of aerospace products. Therefore, the optical path of the spaceborne fiber optic gyro also needs to meet the requirements of low power consumption, high reliability, small size and light weight. [0003] Satellite fiber optic gyro combinations usua...

AI Technical Summary

Problems solved by technology

In the 1550nm band optical fiber, the optical fiber has the best radiation resistance performance, but the 1550nm ASE light source has a large volume, and the erbium-doped fiber has poor radiation resistance performance, which requires complex protective measures and increases the volume and weight of the gyroscope.

The 850nm scheme has the best sensitivity and is easy to realize miniaturization, but the fiber has high radiation-induced loss at 850nm

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