A quick weak light fiber grating array demodulation device and method based on reflection enhancement points

By introducing reflection enhancement points and OTDR technology into the fiber optic grating array demodulation device, the problem of inaccurate segmentation of wavelength grating reflection signals was solved, and efficient and low-cost demodulation of grating position and center wavelength was achieved.

CN120063344BActive Publication Date: 2026-01-02HARBIN INST OF TECH ZHENGZHOU RES INST +1
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Patent Information

Application Number
CN202510210779.8
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2025-02-25
Publication Date
2026-01-02
Estimated Expiration
2045-02-25

AI Technical Summary

Technical Problem

In the current technology, the wavelength grating reflection signal segmentation is inaccurate during high-speed dynamic demodulation, resulting in large demodulation errors and high system costs.

Method used

A fast weak fiber optic grating array demodulation device based on reflection enhancement points is adopted. The optical pulse signal is reflected by the reflection enhancement points. Combined with OTDR technology, the grating position is confirmed by statistically analyzing the reflected light delay. The center wavelength of the grating is segmented and demodulated using a data analysis and processing module.

Benefits of technology

This technology enables accurate segmentation of the reflected signal of each wavelength during high-speed dynamic demodulation, reducing system complexity and cost while improving demodulation accuracy.

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Abstract

A kind of quick weak light fiber grating array demodulation device and method based on reflection enhancement point belong to optical fiber sensing technical field, the present application is to solve the problem of wavelength grating reflection signal segmentation inaccuracy in prior art high-speed dynamic demodulation, make system demodulation error big.This application includes fast scanning laser, electric pulse signal generator, optical pulse modulator, fiber amplifier, fiber circulator, reflection enhancement point, weak grating array sensing unit, photoelectric conversion module, acquisition module, data analysis processing module and control module.Reflection enhancement point and weak grating array sensing unit are reflected to fast scanning optical pulse signal and obtain reflected signal, the reflected signal of reflection enhancement point is segmented to weak grating array reflected optical pulse signal of any wavelength, after data processing, grating position and center wavelength are obtained.The system uses reflection enhancement point to obtain the grating reflected signal of each wavelength, realizes the high-speed dynamic demodulation of weak grating array sensing unit.
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