CAREER: Enabling Technologies for Beyond 1 Tb/s per Wavelength Optical Transport

今天的光子基础设施，其基础建立在几十年前，逐渐从全球骨干网扩展到接入网和其他领域。最近的研究表明，北美的每个家庭都应该以至少100mb /s的速度连接，这是上个世纪的技术无法满足的。100gb /s以太网目前正在标准化中，根据行业专家的说法，1tb /s以太网应该在2012-2013年之前标准化。向更高传输速率的迁移伴随着一些挑战，例如由于不同的线性和非线性信道损伤而导致的信号质量下降以及安装成本的增加。光子学网络的局限性还来自于基础设施的异质性以及不同边界和接口上的相应瓶颈。该多学科研究基金研究不同的方法，以克服异构光网络的限制，实现串行1tb /s光传输，同时使用以较低速度运行的组件。在这种方法中，调制、编码和多路复用以统一的方式进行，因此，有效地，传输、信号处理、检测和解码以更低的符号速率完成。在这些较低的速率下，处理非线性和线性效应是可以管理的，而聚合数据速率保持在1 Tb/s以上。该赠款的主要研究目标可概括如下：(i)开发采用单载波和多载波的不同编码调制方案，以实现每波长1 Tb/s的光传输，并同时减轻各种类型光链路上的信道损伤；（ii）硬件FPGA/ASIC实现编码调制方案；（iii）通过概念验证实施研究来验证拟议的方法。

Today's photonic infrastructure, whose foundations were established several decades ago, gradually extends from global backbone to access networks and beyond. Recent studies indicate that each household in North America should be connected by at least 100 Mb/s, which cannot be accommodated by the last century's technology. The 100 Gb/s Ethernet is currently under standardization, and according to industry experts 1 Tb/s Ethernet should be standardized by the year 2012-2013. Migrating to higher transmission rates comes along with certain challenges such as degradation in the signal quality due to different linear and nonlinear channel impairments and increased installation costs. The limitations of photonics-enabled networks also result from the heterogeneity of the infrastructure and consequential bottlenecks at different boundaries and interfaces. This multidisciplinary research grant studies different approaches to overcome the limitations of heterogeneous optical networks and enable serial 1 Tb/s optical transport, while employing the components operating at lower speeds. In this approach, modulation, coding and multiplexing are performed in a unified fashion so that, effectively, the transmission, signal processing, detection and decoding are done at much lower symbol rates. At these lower rates, dealing with nonlinear and linear effects is manageable while the aggregate data rate is maintained at 1 Tb/s and above. The primary research objectives of this grant can be summarized as follows: (i) development of different coded modulation schemes, employing both single-carrier and multicarrier, to enable 1 Tb/s per wavelength optical transport and for simultaneous mitigation of channel impairments over various types of optical links; (ii) hardware FPGA/ASIC implementation of coded modulation schemes; and (iii) validation of the proposed methodology through proof-of-concept implementation studies.