Coherent Optical SIgnals for extremely high-capacity NEtworks (COSINE)

适用于极高容量网络的相干光信号 (COSINE)

• 批准号: EP/I012702/1
• 负责人: Alwyn Seeds
• 金额: $ 61.77万
• 依托单位: University College London
• 依托单位国家: 英国
• 项目类别: Research Grant
• 财政年份: 2011
• 资助国家: 英国
• 起止时间: 2011 至 无数据
• 项目状态: 已结题
• 来源: https://gtr.ukri.org/projects?ref=EP%2FI012702%2F1
• 关键词: Coherent; Optical; SIgnals; extremely; capacity

High-speed fibre-optic cables link cities, countries and continents across the globe, underpinning the Internet and the fixed and mobile phone networks that enable and enrich our lives today. Historically, increasing the overall data rate transmitted on a single optical fibre has dramatically reduced the cost of data transmission, and this is one factor that has enabled high data rate connections to be available at reasonable cost to end users. As services like social networking, music downloads, and video-on-demand capture the public's attention, they in turn create demand for greatly increased capacity on these networks. We can expect this cycle to continue as the installed fibre capacity is pushed to its limit.To achieve high transmission capacity on a single fibre, data is transmitted on several wavelength channels (wavelength division multiplexing, WDM). For compatibility with the components used in existing systems, and to avoid having to manage a huge number of wavelengths, it is preferable to increase the amount of data transmitted by increasing the data rate per channel, rather than by packing the wavelength channels closer and closer together. WDM networks with 40 Gb/s line rate are now being deployed, and there is currently considerable activity directed towards research and standardisation of 100 Gb/s Ethernet (100 GE) on a single wavelength.By extending the approach proposed for 100 GE by using advanced modulation schemes like those used in wireless communications, it may be possible to squeeze data transmission rates of several hundred Gb/s onto each wavelength, but the technological challenges posed will be significant. To move beyond this - towards 1 Tb/s (1,000 Gb/s) per wavelength - will require new techniques.In this work, we will investigate one approach to achieving this, which also eases some of the stringent demands on the optical transmitters and receivers imposed by current methods. Each wavelength channel will be divided into a number of sub-channels, and advanced modulation formats used to transmit data at a high rate in the narrow spectral band of each sub-channel. It will be necessary to generate the optical signals that define the sub-channels at the transmitter efficiently and cost-effectively, and to produce synchronised optical signals at the receiver to recover the data. To do so, we will generate all the sub-channels at the transmitter from a single laser that defines the frequency of the overall channel, and we will use one sub-channel to transmit information to allow an identical set of optical signals for channel demodulation to be created at the receiver. In this way, the sub-channels are synchronised (phase locked) to each other within the overall channel, as are the transmitter and receiver. This means that the sub-channels can be packed as closely together as possible and behave as a single unit, while recovering the data at the receiver is simplified.By this means we expect to increase the overall fibre transmission capacity to 135 Tb/s, more than an order of magnitude greater than the current state of the art for commercial long haul transmission systems. The work will mainly be carried out experimentally, investigating the key technical elements of the proposal in stages before combining them to show that the full scheme could deliver the anticipated increase in transmission capacity if fully implemented. Areas that will be examined include new ways of generating phase-locked sub-channels at the transmitter; methods for generating and synchronising the corresponding optical signals at the receiver; and modulation and de-modulation techniques giving high data rate transmission in a narrow spectral band. The experimental demonstration will be supported by computer simulations of the system, which will also allow new applications enabled by the approach - too advanced to be demonstrated experimentally at this stage - to be investigated.

高速光纤电缆将全球的城市，国家和大陆连接起来，为互联网以及固定的手机网络提供了支持，这些网络使我们的生活能够使我们的生活充实和丰富。从历史上看，提高单个光纤上传递的总体数据速率已大大降低了数据传输的成本，这是使高数据速率连接以合理的成本以最终用户提供的一个因素。随着社交网络，音乐下载和按需视频的服务引起了公众的注意，它们又引起了人们对这些网络能力大大增加的需求。我们可以预期，随着安装的光纤容量的推动到极限。要在单个光纤上实现高传输能力，数据将在多个波长通道（波长多路复用，WDM）上传输。为了与现有系统中使用的组件的兼容，并且要避免必须管理大量波长，最好通过增加每个通道的数据速率来增加传输的数据量，而不是通过将波长频道封闭越来越紧密。一起。现在正在部署具有40 GB/s线路速率的WDM网络，目前有相当大的活​​动针对单个波长的100 GB/s以太网（100 ge）的研究和标准化。高级调制方案（如无线通信中使用的计划），可能可以将数百GB/s的数据传输速率挤压到每个波长上，但是提出的技术挑战将很大。要超越这一点 - 每个波长迈向1 tb/s（1,000 GB/s） - 将需要新技术。在这项工作中，我们将调查一种实现这一目标的方法，这也减轻了对光学发送器和光学发射机的某些严格需求当前方法施加的接收器。每个波长通道将分为多个子渠道，并在每个子渠道的狭窄光谱带中以高速率传输数据的高级调制格式。有必要生成有效和成本效益的发射器下定义子渠道的光学信号，并在接收方中产生同步的光学信号以恢复数据。为此，我们将从单个激光器中生成发射器上的所有子渠道，该激光器定义整个通道的频率，我们将使用一个子渠道来传输信息，以允许一组相同的光信号来进行通道撤离要在接收器上创建。这样，子渠道和发射机和接收器都在整个通道内同步（相位锁定）。这意味着可以尽可能地将子渠道挤压在一起，并以单个单元的形式填充，同时简化接收器的数据。这意味着我们希望将整体光纤传输能力提高到135 tb/s，对于商业长途传输系统而言，超过当前艺术的数量级。这项工作将主要是在实验中进行的，在结合起来之前，在阶段调查了该提案的关键技术要素，以表明如果完全实施，则可以实现预期的传输能力增加。将检查的区域包括在发射器上生成相锁定子通道的新方法；在接收器处生成和同步相应的光学信号的方法；以及调制和解码技术可在狭窄的光谱带中提供高数据速率传输。实验演示将由系统的计算机模拟支持，该系统还将允许该方法启用新的应用程序 - 太先进了，无法在此阶段进行实验证明。

项目成果

Optical Injection Locking of a DFB laser to a 10-GHz Spaced Frequency Comb Signal

DFB 激光器光注入锁定 10 GHz 间隔频率梳信号

• DOI: 10.1364/fio.2013.ftu1b.6
• 发表时间: 2013
• 作者: Bordonalli A

Fast Optical Spectrum Estimation Using a Digital Coherent Receiver

使用数字相干接收器进行快速光谱估计

• DOI: 10.1049/cp.2013.1611
• 发表时间: 2013
• 作者: Hou-Man Chin

Polarization-insensitive single balanced photodiode coherent receiver for passive optical networks

用于无源光网络的偏振不敏感单平衡光电二极管相干接收器

• DOI: 10.1109/ecoc.2015.7341844
• 发表时间: 2015
• 作者: Erkilinc M

Spectrally-Efficient Single-Sideband Subcarrier-Multiplexed Quasi-Nyquist QPSK with Direct Detection

具有直接检测功能的频谱效率高的单边带副载波复用准奈奎斯特 QPSK

• DOI: 10.1049/cp.2013.1369
• 发表时间: 2013
• 作者: Erkilinc M

Nyquist-shaped dispersion-precompensated subcarrier modulation with direct detection for spectrally-efficient WDM transmission.

• DOI: 10.1364/oe.22.009420
• 发表时间: 2014-04
• 期刊: Optics express
• 影响因子: 3.8
• 作者: M. S. Erkılınç;S. Kilmurray;R. Maher;M. Paskov;R. Bouziane;S. Pachnicke;Helmut Griesser;B. Thomsen;P. Bayvel;R. Killey