Terabit-per-Second Coherent Optical Fiber Communications

太比特每秒相干光纤通信

• 批准号: 4736-2013
• 负责人: Cartledge, John
• 金额: $ 3.72万
• 依托单位: Queen's University
• 依托单位国家: 加拿大
• 项目类别: Discovery Grants Program - Individual
• 财政年份: 2017
• 资助国家: 加拿大
• 起止时间: 2017-01-01 至 2018-12-31
• 项目状态: 已结题
• 来源: https://www.nserc-crsng.gc.ca/ase-oro/Details-Detailles_eng.asp?id=637227
• 关键词: Terabit; per; Second; Coherent; Optical

Optical fiber communication systems are used extensively throughout the global telecommunications network to provision virtually all services in the business, educational, healthcare and entertainment sectors. The rising demand for these services, many of which were unimaginable until recently, is driving the expansion of this network at dramatic rates and has pushed the per-channel bit rate of optical signals to 100 Gbit/s for state-of-the-art commercial systems. These systems are enabled by a fundamentally different approach based on coherent detection and digital signal processing. Next generation systems with a per-channel bit rate of 400 Gbit/s are currently being developed, and the need for a bit rate of 1 Tbit/s in the future is seen as certain. The research on coherent optical fiber communications reported to date has largely concentrated on performing the signal processing functions for a single channel in a conventional wavelength division multiplexed system that uses a fixed channel spacing of 50 GHz. To increase the per-channel bit rate to 1 Tbit/s, a strategy based on simply increasing the modulation rate is not applicable due to system design constraints and technology limitations. A bit rate of 1 Tbit/s can be achieved using a superchannel, which is comprised of multiple closely spaced optical subcarriers which collectively are considered as a single entity. Since superchannels are not compatible with current fixed-grid, wavelength division multiplexed systems, the concept of elastic optical networks has recently emerged as a means of accommodating channels with different modulation formats and symbol rates, and maximizing spectral efficiency. The proposed research embraces these recent innovations by focusing on 1 Tbit/s superchannels in elastic optical networks. The co-existence of such channels on a fiber and the distinct features of superchannels introduce new challenges in system design and performance evaluation. Three Ph.D. students will be trained through this research which addresses techniques for evaluating the system performance, digital signal processing algorithms that exploit the unique properties of the systems, and key subsystems required to support the experimentally intensive investigation.

光纤通信系统在整个全球电信网络中广泛使用，以便在业务，教育，医疗保健和娱乐领域提供几乎所有服务。对这些服务的需求不断上升，直到最近才无法想象，这些服务的需求仍以巨大的速度推动了该网络的扩展，并将光学信号的每通道比特速率提高到了100 GBIT/s，用于先进的商业系统。这些系统是通过基于连贯检测和数字信号处理的根本不同方法来启用的。目前正在开发具有每通道比特率为400 Gbit/s的下一代系统，并且将来需要1 tbit/s的比特速率被视为确定。关于迄今为止报告的相干光纤通信的研究主要集中在传统波长的多路复用系统中使用50 GHz的固定通道间距执行单个通道的信号处理函数。为了将每通道比特率提高到1 Tbit/s，由于系统设计限制和技术限制，基于简单提高调制率的策略不适用于调制率。可以使用超级通道来实现1 Tbit/s的比特率，该通道由多个紧密间隔的光学子载波组成，该载体统称为单个实体。由于超通道与当前固定网格，波长多路复用系统不兼容，因此弹性光学网络的概念最近已成为一种适应具有不同调制格式和符号速率的通道的手段，并最大程度地提高光谱效率。拟议的研究通过着重于弹性光学网络中的1个TBIT/S超通道来涵盖这些最近的创新。此类渠道在纤维上的共存以及超通道的独特特征引入了系统设计和性能评估中的新挑战。三博士将通过这项研究对学生进行培训，该研究旨在评估用于利用系统独特属性的系统性能，数字信号处理算法以及支持实验密集型调查所需的关键子系统。