Petabit Energy Aware Capacity Enhancement (PEACE)

拍比特能源意识容量增强 (PEACE)

• 批准号: EP/L000091/1
• 负责人: Andrew Ellis
• 金额: $ 148.3万
• 依托单位: Aston University
• 依托单位国家: 英国
• 项目类别: Fellowship
• 财政年份: 2014
• 资助国家: 英国
• 起止时间: 2014 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FL000091%2F1
• 关键词: Petabit; Energy; Aware; Capacity; Enhancement

As recently discussed by the Wall Street Journal, the remarkable success of the internet may be attributed to the tremendous capacity of unseen underground and undersea optical fibre cables and the technologies associated with them. Indeed, the initial surge in web usage in the mid 1990s coincides with the commissioning of the first optically amplified transatlantic cable network, TAT12/13 allowing ready access to information otherwise inaccessible. Tremendous progress has been made since then, with the introduction of wavelength division multiplexing, where multiple colours of light are used to establish independent connections through the same fibre and coherent detection, the optical analogue of an advanced radio receiver able to detect both amplitude and frequency (or phase) modulation simultaneously enabling the information carrying capacity to be doubled and the required signal power to be reduced. To manage the costs, communication networks typically aggregate connections between many users onto a single communications link within the core of the network, avoiding the tremendous costs associated with dedicated links for all users across vast distances. Typically the trade of between cost and reliability has resulted in traffic from several thousand customers being aggregated onto a single fibre resulting in bit rates in the region of 100 Gbit/s per wavelength channel to support broadband connections of around 10 Mbit/s. However, this has resulted in intensities in optical fibres that are a million times greater than sunlight at the surface of the Earth's atmosphere and so the signal is significantly distorted by nonlinearly (a similar effect to overdriving load speakers). This distortion limits the maximum amount of information which may be transmitted across and optical fibre link, and unless combated, the nonlinear response will result in a capacity crunch, limiting access to the internet to today's levels.This project aims to allow the continued increase of the bandwidth of these fibre networks underpinning modern communications, including 17.6 million UK mobile internet connections and 70% penetration of home broadband connections. To increase capacity we will maximise spectral use, by adapting techniques found in mobile phones for use in fibre networks, resolving the significant issues associated with processing data with 1,000,000 times greater bandwidth using a balance of digital and analogue electronic and optical processing. This will reduce cost, size and power consumption associated with producing Tb/s capacities per wavelength. Critically, the project will develop techniques to understand and mitigate the nonlinear signal distortions. Nonlinear distortions occur within a channel, between channels and between each channels and noise originating in the optical amplifiers. By transforming the signal mid way along the link, we will exploit the nonlinear response of the second half of the fibre link to cancel the nonlinear distortion of the first to minimise the impact of nonlinear distortion associated with the channels themselves, and optimise the configuration of the system to minimise the nonlinear interaction with the noise, resulting in orders of magnitude increases in the maximum capacity of the optical fibre system.

正如《华尔街日报》最近所讨论的那样，互联网的巨大成功可能要归功于看不见的地下和海底光纤电缆的巨大容量以及与之相关的技术。事实上，在20世纪90年代中期，网络使用的最初激增与第一个光纤放大的跨大西洋电缆网络（TAT12/13）的投入使用相吻合，该网络允许随时访问否则无法访问的信息。从那时起，随着波分复用的引入，取得了巨大的进步，其中使用多种颜色的光通过相同的光纤和相干检测建立独立的连接，先进的无线电接收器的光学模拟能够同时检测振幅和频率（或相位）调制，从而使信息承载能力增加一倍，所需的信号功率降低。为了控制成本，通信网络通常将许多用户之间的连接聚合到网络核心内的单个通信链路上，从而避免了与远距离所有用户的专用链路相关的巨大成本。通常，成本和可靠性之间的权衡导致来自数千个客户的流量被聚合到单个光纤上，从而导致每个波长通道的比特率在100 Gbit/s左右，以支持大约10 Mbit/s的宽带连接。然而，这导致光纤的强度比地球大气层表面的阳光强度高100万倍，因此信号被非线性显著扭曲（类似于过载扬声器的效果）。这种失真限制了可能通过光纤链路传输的最大信息量，除非加以对抗，否则非线性响应将导致容量紧缩，将互联网访问限制在今天的水平。该项目旨在使这些支撑现代通信的光纤网络的带宽持续增加，包括1760万英国移动互联网连接和70%的家庭宽带连接普及率。为了增加容量，我们将最大限度地利用频谱，通过将移动电话中的技术应用于光纤网络，解决与使用数字和模拟电子和光学处理的平衡以100万倍的带宽处理数据相关的重大问题。这将降低生产每波长Tb/s容量的成本、尺寸和功耗。关键的是，该项目将开发技术来理解和减轻非线性信号失真。非线性失真发生在通道内、通道之间和每个通道之间，以及源自光放大器的噪声。通过在链路的中途转换信号，我们将利用光纤链路的后半部分的非线性响应来消除第一部分的非线性失真，以尽量减少与通道本身相关的非线性失真的影响，并优化系统的配置以尽量减少与噪声的非线性相互作用，从而使光纤系统的最大容量增加几个数量级。

项目成果

Symmetry Requirements for 34dB Nonlinearity Compensation in OPC Systems

OPC 系统中 34dB 非线性补偿的对称性要求

• DOI: 10.1109/ecoc.2018.8535552
• 发表时间: 2018
• 作者: Al-Khateeb M

Optimization of Parametric Comb Generation Using Interferometric Wavelength Selective Switch

使用干涉波长选择开关优化参数梳生成

• DOI: 10.1364/cleo_at.2017.jw2a.31
• 发表时间: 2017
• 作者: Al-Khateeb M

Effect of second order signal-noise interactions in nonlinearity compensated optical transmission systems.

• DOI: 10.1364/ol.41.001849
• 发表时间: 2016-04
• 期刊: Optics letters
• 影响因子: 3.6
• 作者: M. Al-Khateeb;M. McCarthy;C. Sánchez;A. Ellis

Experimental Verification of Four Wave Mixing in Lumped Optical Transmission Systems that Employ Mid-Link Optical Phase Conjugation

采用中间链路光相位共轭的集总光传输系统中四波混频的实验验证

• DOI: 10.1364/cleo_at.2017.jth2a.64
• 发表时间: 2017
• 作者: Al-Khateeb M

Performance Enhancement Prediction for Optical Phase Conjugation in Systems with 100km Amplifier Spacing

放大器间距为 100km 的系统中光相位共轭的性能增强预测

• DOI: 10.1109/ecoc.2017.8346053
• 发表时间: 2017
• 作者: Al-Khateeb M