Beyond 100 Gb/s: Capacity, Flexibility, and Network Optimization
- 7 February 2017
- journal article
- Published by Optica Publishing Group in Journal of Optical Communications and Networking
- Vol. 9 (4), C12-C24
- https://doi.org/10.1364/jocn.9.000c12
Abstract
In this paper, we discuss building blocks that enable the exploitation of optical capacities beyond . Optical networks will benefit from more flexibility and agility in their network elements, especially from coherent transceivers. To achieve capacities of and more, coherent transceivers will operate at higher symbol rates. This will be made possible with higher bandwidth components using new electro-optic technologies implemented with indium phosphide and silicon photonics. Digital signal processing will benefit from new algorithms. Multi-dimensional modulation, of which some formats are already in existence in current flexible coherent transceivers, will provide improved tolerance to noise and fiber nonlinearities. Constellation shaping will further improve these tolerances while allowing a finer granularity in the selection of capacity. Frequency-division multiplexing will also provide improved tolerance to the nonlinear characteristics of fibers. Algorithms with reduced computation complexity will allow the implementation, at speeds, of direct pre-compensation of nonlinear propagation effects. Advancement in forward error correction will shrink the performance gap with Shannon’s limit. At the network control and management level, new tools are being developed to achieve a more efficient utilization of networks. This will also allow for network virtualization, orchestration, and management. Finally, FlexEthernet and FlexOTN will be put in place to allow network operators to optimize capacity in their optical transport networks without manual changes to the client hardware.
Keywords
This publication has 33 references indexed in Scilit:
- Design Tradeoffs and Challenges in Practical Coherent Optical Transceiver ImplementationsJournal of Lightwave Technology, 2015
- Fundamentals of Coherent Optical Fiber CommunicationsJournal of Lightwave Technology, 2015
- Next generation sliceable bandwidth variable transpondersIEEE Communications Magazine, 2015
- High Capacity Transport—100G and BeyondJournal of Lightwave Technology, 2014
- Terabit bandwidth-adaptive transmission using low-complexity format-transparent digital signal processingOptics Express, 2014
- Advances in High-Speed DACs, ADCs, and DSP for Optical Coherent TransceiversJournal of Lightwave Technology, 2013
- Spectral Efficiency-Adaptive Optical Transmission Using Time Domain Hybrid QAM for Agile Optical NetworksJournal of Lightwave Technology, 2013
- Rate-adaptable optics for next generation long-haul transport networksIEEE Communications Magazine, 2013
- Digital Coherent Optical Receivers: Algorithms and SubsystemsIEEE Journal of Selected Topics in Quantum Electronics, 2010
- Real-time measurements of a 40 Gb/s coherent systemOptics Express, 2008