Design and control of highly spectrally efficient photonic networks enabled by fiber-granular routing on overlaid ring-shaped topologies
Journal article, 2021

We propose an ultradense wavelength-division-multiplexing (WDM) network architecture that dramatically enhances channel accommodation density to achieve extremely high spectral efficiency. The trade-offs between high spectral efficiency and severe signal impairment due to optical filtering are resolved by network optimization of the overlaid subnetworks based on fiber-granular routing and wavelength-granular add/drop operations. The spectrum narrowing induced by node operations is well controlled by the impairment-suppressing routing and wavelength assignment (RWA) method. Numerical simulations on several metro-scale network topologies verify that the proposal enhances the spectral efficiency by up to 31.0% compared to comparable dense WDM networks.




Optical transmitters

Optical switches


WDM networks


Ryuta Shiraki

Nagoya University

Yojiro Mori

Nagoya University

Hiroshi Hasegawa

Nagoya University

Ken-Ichi Sato

National Institute of Advanced Industrial Science and Technology (AIST)

Paolo Monti

Chalmers, Electrical Engineering, Communication, Antennas and Optical Networks

Journal of Optical Communications and Networking

1943-0620 (ISSN) 19430639 (eISSN)

Vol. 13 11 233-243

Subject Categories

Computer Engineering


Communication Systems



More information

Latest update

8/3/2021 1