Multi-Granular Switching Node and Enabling Devices

doi:10.1109/JLT.2024.3454380

Multi-Granular Switching Node and Enabling Devices

2025-02-15

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DOI：10.1109/JLT.2024.3454380

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Multi-band and space-division-multiplexing (SDM) is essential for realizing future high-capacity networks. A multi-band system needs to employ more bands other than conventional C+L bands, and SDM technology includes a multi-fiber system with multi-degree nodes. One challenge to realize multi-degree nodes is the scalability of devices. To address this issue, we propose a configuration of a multi-granular switching node by introducing a band cross-connect in addition to the conventional wavelength cross-connect, which relaxes the requirements for the devices. However, at the same time, new classes of devices need to be developed to construct the multi-granular switching node. We describe the multi-granular switching node and its enabling devices. We also prove that the proposed configuration of the band-granular switching node provides better transmission characteristics than a conventional CDC-ROADM only node.

Keywords:

Optical switches

Optical fibers

Optical fiber networks

Optical fiber amplifiers

Optical amplifiers

Transponders

Transmission line matrix methods

Band-granular switching

colorless

directionless

and contentionless reconfigurable optical add/drop multiplexing (CDC-ROADM)

dynamic gain equalizer

multi-band network

narrow guard-band band (de)multiplexer

silica-based planar lightwave circuit

transponder aggregation

wavelength selective switch (WSS)

Multi-Granular Switching Node and Enabling Devices

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