Control device, compensation device, optical reception device, optical communication system, program, and control method

The control device employs a finite impulse response filter for digital signal processing to address phase noise and polarization fluctuations in optical transmission systems, providing accurate compensation and improving system efficiency and error reduction.

WO2024261987A1PCT designated stage expired Publication Date: 2024-12-26MEIJI UNIV +1
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Patent Information

Application Number
PCT/JP2023/023210
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Filing Date
2023-06-22
Publication Date
2024-12-26

AI Technical Summary

Technical Problem

Optical transmission systems face challenges with phase fluctuations such as optical phase noise and polarization fluctuations, which can lead to code errors due to nonlinear optical effects, fiber vibrations, and other factors, and existing methods struggle to accurately measure and compensate for these fluctuations in real-time.

Method used

A control device and method that uses a finite impulse response filter for digital signal processing to compensate for birefringence and polarization mode dispersion, with a detection system to evaluate polarization fluctuations and adjust filter settings based on real-time measurements, allowing for accurate phase noise evaluation and polarization fluctuation detection.

Benefits of technology

This approach enables precise evaluation and compensation of phase noise and polarization fluctuations, improving the operational efficiency and maintenance of optical transmission systems by reducing code errors and enhancing signal integrity.

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Abstract

Provided is a control device for controlling operation of a compensation device for using digital signal processing using a finite impulse response filter to compensate birefringence and / or polarization mode dispersion applied on signal light propagated through an optical transmission path, the control device comprising: a detection signal reception unit that receives a detection signal, which is a signal indicating a detection result of a detection device that optically detects polarization fluctuation in the optical transmission path; and a setting unit that determines, on the basis of a detection result of the detection device, a setting related to an update frequency or an update interval of the number of taps of the finite impulse response filter or an update frequency or an update interval of a tap coefficient of the finite impulse response filter.
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Citation Information

Patent Citations

  • Optical receiver and tap coefficient update method

    JP2017028359A

  • Optical receiver, optical reception method and optical communication system

    WO2018079598A1

  • Digital coherent receiver and digital coherent reception method

    WO2020054393A1

  • receiver

    WO2021038677A1