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

A polarization-maintaining fiber ring and polarization crosstalk technology, which is used in optical instrument testing, testing optical performance, measuring devices, etc., and can solve problems such as changes in light polarization state and fiber optic gyro errors.

Active Publication Date: 2017-10-20
BEIHANG UNIV
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  • Application Information

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

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Embodiment Construction

[0024] The specific embodiments of the present invention will be described in further detail below in conjunction with the accompanying drawings.

[0025] The invention provides a method for processing polarization crosstalk data of a polarization-maintaining optical fiber ring for an optical fiber gyroscope. The method removes the background noise of the measured fiber ring polarization crosstalk distribution data by setting the threshold, divides the polarization crosstalk distribution data by testing the coherence length of the wide-spectrum light source, and uses the established polarization crosstalk interference model to real The intensity of polarization crosstalk is solved to generate more optimized individual polarization crosstalk data.

[0026] Further, by setting a threshold to remove the background noise of the measured optical fiber ring polarization crosstalk distribution data, the polarization crosstalk background noise measured by the optical coherence domain ...

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01M11/02
CPCG01M11/331
Inventor 杨远洪谢泽闫晗杨福铃
Owner BEIHANG UNIV
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