Optical path optical fiber welding method suitable for optical fiber gyroscope

By detecting back reflection in real time during the fiber optic fusion splicing stage of the fiber optic gyroscope optical path, the problem of accuracy deviation caused by back reflection error in the fiber optic gyroscope optical path is solved, thereby improving detection efficiency and splicing quality.

CN121386090APending Publication Date: 2026-01-23HUBEI SANJIANG AEROSPACE HONGFENG CONTROL
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Patent Information

Application Number
CN202511594828.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2025-11-03
Publication Date
2026-01-23

AI Technical Summary

Technical Problem

Existing technologies cannot effectively detect the specific location of back reflection in the optical path of a fiber optic gyroscope, resulting in excessive accuracy and requiring a large amount of manpower and resources for troubleshooting.

Method used

During the fiber optic fusion splicing stage of the fiber optic gyroscope optical path, the output power value of the light source is measured and a calibration value is set. Each splicing point is spliced ​​step by step, and the back reflection value is detected in real time. Power values ​​are collected using an optical power meter and a detector to ensure the quality of each splicing point.

Benefits of technology

This technology enables real-time detection of each splice point during the optical path splicing process of a fiber optic gyroscope, improving detection efficiency, avoiding accuracy deviations caused by back reflection errors, and reducing waste of manpower and resources.

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Abstract

The invention discloses an optical path fiber welding method suitable for a fiber-optic gyroscope, which belongs to the field of fiber-optic gyroscopes, and comprises the following steps: S1, measuring the output power value of a light source, and setting a calibration value; s2, performing optical fiber fusion splicing between the light source and the coupler; s3, starting a light source, obtaining an output power value of the coupler, obtaining a back reflection value, if the output power value is less than or equal to the back reflection value, turning to the next step, and if the back reflection value is greater than the back reflection value, carrying out welding again or replacing components; and S4-S6, sequentially carrying out optical fiber fusion welding between the coupler and the Y waveguide, between the Y waveguide and the optical fiber ring and between the coupler and the detector, and carrying out detection to complete optical path connection. According to the optical path optical fiber fusion splicing method, backward reflection detection of all fusion splicing point positions, the coupler, the Y waveguide and the optical fiber ring is carried out in the fusion splicing stage, backward reflection detection of the whole optical path is more comprehensive, the optical path structure quality can be controlled in advance, and the problem that the precision of an optical fiber gyroscope is out of tolerance due to backward reflection errors is effectively avoided.
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