Beyond Exabit Optical Communications: from new devices, via new dimensions to new systems

超越 Exabit 光通信：从新设备，通过新维度到新系统

• 批准号: MR/T041218/1
• 负责人: Filipe Marques Ferreira
• 金额: $ 156.03万
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2020
• 资助国家: 英国
• 起止时间: 2020 至 无数据
• 项目状态: 未结题
• 来源: https://gtr.ukri.org/projects?ref=MR%2FT041218%2F1
• 关键词: Beyond; Exabit; Optical; Communications; new

The aim of this fellowship is to develop disruptive approaches through theory and experiment to unlock the capacity of future information systems. To go beyond current channel limits is arguably the greatest challenge faced by digital optical communications. To target it, the proposed research will combine techniques from information theory, coding, higher-dimensional modulation formats, digital signal processing, advanced photonic design, and machine learning to make possible breakthrough developments to ensure a robust communications infrastructure beyond tomorrow.Optical communications have to-date been able to fulfil the ever-growing data demand whilst simultaneously reducing cost and energy-per bit. However, it is now recognised that systems are rapidly approaching the fundamental information capacity of current transmission technologies, a trend with potential negative impact on the economy and social progress. To meet future demands with prospective cost and energy savings and avoid the impending exhaust of fibre capacity, the only solution is the emergent technology of spatial division multiplexing (SDM). It provides much wider conduits of information by offering additional means for transporting channels over one single fibre, using multi-mode and multi-core fibres. However, SDM has not yet found a viable path to access this much higher information capacity. State-of-the-art SDM transceivers are only compatible with few-mode/few-core fibres (~10 paths) given the requirement to multiplex/demultiplex over all the fibre pathways to successfully estimate and unravel pathways crosstalk and walk-off. This completely defeats SDM's purpose, the installation of new fibres must allow for several decades of capacity growth to offset the high deployment costs of new cables.This fellowship envisages how to transform SDM technology to drive future optical networks by addressing the key issue overlooked by the research community since the introduction of SDM concepts: optical transceivers must undergo >100-fold integration to enable the benefits of multi-mode/core. Focus on new transceivers capable of digital space modulation will enable scalability of all data pathways to reduce the cost and energy-consumption per bit. Digital spatial modulation in novel coherent transmission schemes, i.e. the pathway index itself is used to carry information, will open fundamentally new theoretical and experimental possibilities up to now unexplored. These new transceivers will be capable of exploiting the multidimensional channel properties in the linear and nonlinear regimes through new spatial modulation formats and coding guided by new information theory and nonlinear science methods. Two main challenges are to construct a high-speed digital spatial modulator capable of dynamically addressing different groups of paths (potentially with tens of paths) in massive multi-path fibres and to develop new learning algorithms (guided by new theory methods) suitable of being embedded in spatial-adaptable transceivers to reach the ultimate capacity of nonlinear multi-dimensional channels.

该奖学金的目的是通过理论和实验开发破坏性的方法，以释放未来信息系统的能力。超越当前渠道限制可以说是数字光学通信面临的最大挑战。为了实现目标，拟议的研究将结合信息理论，编码，高维调制格式，数字信号处理，高级光子设计和机器学习的技术，以使可能的突破性开发以确保明天以后的稳健通信基础设施。光能通信已经能够付诸实践，并且能够满足不断增长的数据需求，并同时重新恢复成本和能量成本。但是，现在已经认识到，系统正在迅速接近当前传输技术的基本信息能力，这是对经济和社会进步的潜在负面影响的趋势。为了满足未来的需求，并节省了预期的成本和节能，并避免了纤维容量的排气，唯一的解决方案是空间施工多重运输（SDM）的新兴技术。它通过使用多型纤维和多核纤维在一个单个光纤上运输通道的其他手段来提供更多的信息管道。但是，SDM尚未找到可行的途径来访问这一更高的信息能力。最先进的SDM收发器仅与几个模式/少数芯纤维（〜10个路径）兼容，因为在所有纤维途径上需要多重/磁性途径，才能成功估算和揭开crosstalk和行走。 This completely defeats SDM's purpose, the installation of new fibres must allow for several decades of capacity growth to offset the high deployment costs of new cables.This fellowship envisages how to transform SDM technology to drive future optical networks by addressing the key issue overlooked by the research community since the introduction of SDM concepts: optical transceivers must undergo >100-fold integration to enable the benefits of multi-mode/core.专注于能够进行数字空间调制的新收发器，将使所有数据途径的可扩展性降低每位的成本和能量消耗。新型相干传输方案中的数字空间调制，即途径索引本身用于携带信息，直到目前尚未开发出来的新理论和实验可能性。这些新的收发器将能够通过新的空间调制格式和以新信息理论和非线性科学方法为指导的线性和非线性制度中利用多维通道性能。两个主要的挑战是构建一个高速数字空间调制器，能够在巨大的多路径纤维中动态地解决不同的路径（可能具有数十多个路径），并开发新的学习算法（以新理论方法为指导），可用于嵌入空间适应能力的非适应能力中，以达到非元素的最终多数型通道。

项目成果

On a Scalable Path for Multimode SDM Transmission

• DOI: 10.1109/jlt.2023.3308777
• 发表时间: 2024-01
• 期刊: Journal of Lightwave Technology
• 影响因子: 4.7
• 作者: F. A. Barbosa;Filipe M. Ferreira

On the advantages of principal modes for multimode SDM transmission systems

多模SDM传输系统主要模式的优点

• 发表时间: 2023
• 作者: Fabio A. Barbosa

First Experimental Mach-Zehnder FOPA for Polarization- and Wavelength-Division-Multiplexed Signals

第一个用于偏振和波分复用信号的实验性 Mach-Zehnder FOPA

• DOI: 10.1109/ecoc52684.2021.9605811
• 发表时间: 2021
• 作者: Bessin F

Scaling Spatial Multiplexing with Principal Modes

• DOI: 10.1109/ipc53466.2022.9975662
• 发表时间: 2022-11
• 期刊: 2022 IEEE Photonics Conference (IPC)
• 作者: F. A. Barbosa;F. Ferreira

Experimental Demonstration of a Simplified SOA Nonlinearity Mitigation scheme

简化 SOA 非线性缓解方案的实验演示

• 发表时间: 2023
• 作者: Eric Sillekens