Mode division multiplexing systems, methods, devices, and storage media

By adaptively adjusting the optical fiber transmission mode through the central controller and mode adjustment unit in the mode division multiplexing system, the problems of mode correlation loss and differential mode group delay in multimode optical fiber are solved, thereby improving transmission performance.

CN116527195BActive Publication Date: 2026-08-04PENG CHENG LAB
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Patent Information

Application Number
CN202310470280.1
Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Filing Date
2023-04-24
Publication Date
2026-08-04
Estimated Expiration
2043-04-24

AI Technical Summary

Technical Problem

Multimode fiber suffers from mode-dependent loss (MDL) and differential mode group delay (DMD) during transmission, which increases the computational complexity at the receiver of the communication system and limits the transmission distance.

Method used

A modal division multiplexing system is adopted. The transmission parameters of each fiber transmission unit across the span are obtained through the central controller, the target mode round-robin strategy is generated, and the mode adjustment unit is used to make adaptive adjustments in the fiber transmission unit to optimize the transmission mode and reduce differential mode group delay (DMD) and mode-dependent loss (MDL).

Benefits of technology

It achieves adaptive adjustment in different spans and transmission environments, reduces differential mode group delay (DMD) and mode-dependent loss (MDL), and improves the transmission performance of multimode fiber.

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Abstract

This invention provides a mode-division multiplexing (MDF) system, method, device, and storage medium, relating to the field of optical communication technology. The MDF system includes at least: multiple cascaded optical fiber transmission units across multiple spans and a central controller. Each optical fiber transmission unit includes multimode or few-mode fiber and a mode adjustment unit. The mode adjustment unit calculates the transmission parameters of the optical fiber transmission unit and sends these parameters to the central controller. The central controller acquires the transmission parameters of the optical fiber transmission units in each span, generates a target mode round-robin strategy for the corresponding span, and sends it to the mode adjustment unit to update the optical signal module. The central controller adaptively selects the target mode round-robin strategy based on the real-time transmission environment, adaptively adjusting each span to reduce differential mode group delay (DMD) and mode-dependent loss (MDL), adapting to different span lengths and different transmission environments, and improving the transmission performance of multimode or few-mode fiber.
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