A method for improving the temperature sensitivity of optical fiber ring in optical fiber gyroscope

By winding the internal vibration-absorbing layer and the sensitive fiber layer in the fiber gyroscope, and winding the depolarized fiber on the outside of the fiber ring, the problems of complex structure and large volume in the prior art are solved, and the miniaturization of the fiber gyroscope and the improvement of the temperature performance are achieved.

CN119756324APending Publication Date: 2025-04-04AVIC JIERUI (XIAN) OPTOELECTRONIC TECH CO LTD
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Patent Information

Application Number
CN202411967726.2
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-12-30
Publication Date
2025-04-04

AI Technical Summary

Technical Problem

In the existing fiber gyroscopes, the method of improving the temperature sensitivity of fiber rings through structural thermal design has problems such as complex structure and large fiber gyroscopes.

Method used

By winding the inner vibration-absorbing layer and the sensitive fiber layer with glue, an optical fiber ring is formed, and a single-stage winding of the polarization optical fiber is wound outside the fiber ring, and fixed with glue liquid with heat insulation function to reduce the volume of the fiber gyroscope.

Benefits of technology

The effect of reducing the volume of fiber gyroscopes is achieved, while avoiding the gyroscope temperature change performance problems caused by improper coiling of anti-polarized fibers. It has a simple structure and simple operation.

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Abstract

The present invention relates to the technical field of fiber optic gyroscope design, and in particular to a method for improving the temperature sensitivity of an optical fiber ring in a fiber optic gyroscope. The method solves the problems that the existing method for improving the temperature sensitivity of an optical fiber ring has a complex structure and a large volume of the optical fiber gyroscope. The method comprises: winding a 2-4 layer optical fiber gyroscope inner vibration reduction layer with glue; winding a sensitive optical fiber layer with glue on the outer surface of the optical fiber of the inner vibration reduction layer, and performing a leveling process according to a winding method; curing the optical fibers of the inner vibration reduction layer and the sensitive optical fiber layer together to form an optical fiber ring; cleaning the surface of the cured optical fiber ring; using an adhesive with a heat insulation function to carry out the winding with glue, and winding the depolarized optical fiber with glue to the outside of the optical fiber ring by a monopole winding method; the end of the depolarized optical fiber is reserved on the surface of the optical fiber ring for fiber outlet, and a reserved length is reserved; curing the optical fiber ring again; cleaning the residual glue; connecting the reserved depolarized optical fiber end with the pigtail of the coupler and the phase modulator according to the optical path plan to complete the assembly and adjustment of the optical fiber gyroscope.
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