Upgrade to 52 Gbaud coherent detection for high spectral efficiency links

最大限度地提高光纤通信的容量是近十年来光纤通信研究的重点，主要集中在1)高阶正交幅度调制(QAM)、2)更高的波特率和3)空间多路复用。所要求的升级将使我们能够在更高的波特率下进行实验，并与相干探测方面的开创性研究保持同步。我们的研究小组研究了减轻光通信链路中的损伤和增加这些链路容量的技术。我们从系统的角度解决光学和数字信号处理(DSP)解决方案。研究涉及理论基础、数值模拟、部件设计以及实验演示和验证。目前特别感兴趣的问题包括使用高阶调制格式的相干检测--这是一个具有工业重要性和相关性的专题，以及科学/学术感兴趣的信息理论方面。所要求的设备升级将允许我们在这一领域的实验进入新兴的操作制度，这些制度现在只存在于研究实验室，但已经出现在公司的路线图上，用于商业开发。

Maximizing the capacity of fiber communications is the rally cry for research in optical communications this decade, with focus on 1) high order quadrature amplitude modulation (QAM), 2) higher baud rates, and 3) spatial multiplexing. The requested upgrade will permit us to achieve experimentation at higher baud rates and to keep pace with ground breaking research in coherent detection. Our research group examines techniques for mitigation of impairments in optical communications links and for increasing the capacity of those links. We address both optical and digital signal processing (DSP) solutions from a systems perspective. Research addresses theoretical underpinnings, numerical simulations, component design and experimental demonstrations and validations. Current issues of particular interest include the use of coherent detection with higher order modulation formats - a topic with industrial importance and relevance, as well as information theoretic aspects of scientific/academic interest. The equipment upgrade requested will allow our experimentation in this area to move into emerging regimes of operation that now exist only in research laboratories, but are already on company roadmaps for commercial exploitation.