Optical fiber ring detection device and method based on polarization crosstalk principle

The invention belongs to the field of optical fiber sensing technology and optical measurement, and provides an optical fiber ring detection device and method based on a polarization crosstalk principle, and the method comprises the steps: (1) obtaining the position and intensity information of a polarization crosstalk point in an optical fiber ring according to the collected position and intensity information; (2) resolving the relationship between the polarization crosstalk intensity and the counter-axis angle, enabling the polarization crosstalk point to be equivalent to a welding point accordingly and establishing a Jones matrix of an optical fiber ring polarization crosstalk model; (3) selecting out the fiber-optic gyroscope meeting the precision requirement according to the estimatedstatic zero offset value of the measured fiber-optic ring, and connecting the fiber-optic gyroscope into a gyroscope system; and (4) carrying out vibratory stress relief treatment on the screened optical fiber rings which do