Fiber optic gyroscope-used polarization-maintaining fiber ring distribution polarization crosstalk data processing method

Abstract

The invention provides a fiber optic gyroscope-used polarization-maintaining fiber ring distribution polarization crosstalk data processing method. Polarization-maintaining fiber ring distribution polarization crosstalk data are measured by an optical coherence domain polarimeter, false polarization coupling data exist, and processing is needed to acquire true polarization coupling data. The data processing process comprises steps: 1) a threshold is set to remove background noise of the distribution polarization crosstalk data; 2) based on a test wide spectrum light source coherent length, coupling state division is carried out on the polarization crosstalk distribution data; 3) based on a built crosstalk interference model, data in different coupling states are subjected to true polarization crosstalk intensity and position calculation; and 4) fiber optic gyroscope-used polarization-maintaining fiber ring distribution polarization crosstalk data unrelated to the test light source are formed. The problem of information aliasing brought by directly using the polarization crosstalk distribution data can be avoided, and as the obtained data through processing are not related to parameters of the test light source, the problem of inconsistency between the test state and the actual application state in the fiber optic gyroscope is solved.

Description

technical field [0001] The invention relates to the technical field of optical fiber gyroscope measurement, in particular to a polarization-maintaining optical fiber ring distribution polarization crosstalk data processing method for an optical fiber gyroscope. Background technique [0002] The polarization state is the essential object of fiber optic gyroscope measurement. The polarization maintaining fiber ring can well ensure that the polarization state of light does not change during the propagation of the fiber ring optical path. As one of the main components of the fiber optic gyroscope, it determines the ultimate accuracy of the fiber optic gyroscope. Due to the defects of the polarization-maintaining fiber itself and the process of surrounding the ring of the fiber, the fiber ring will generate polarization coupling points. When the light propagating in the optical fiber ring optical path passes through the polarization coupling point, coupled light will be generated...

AI Technical Summary

Problems solved by technology

When the light propagating in the optical fiber ring optical path passes through the polarization coupling point, coupled light will be generated, resulting in a change in the polarization state of the light, which will cause errors in the fiber optic gyroscope.

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