Ultra-High-Capacity Optical Communications and Networking: Towards 100 Tb/s Communication on a Single Optical Fiber

我们建议在几年内开发能够在单光纤上以超过100tb /s的速率进行通信的技术。为了在硅纤维的低损耗窗口（1200-1700 nm）中实现这一目标，将需要新的非常宽带的器件，特别是光放大器。此外，还需要频谱效率远远超过单位的调制技术。我们的研究活动将集中在这两个领域。我们将研究调制技术和相关的检测方案，以在项目结束时获得4 b/s/Hz的频谱效率。这些技术将被设计成能够抵抗PMD和光纤非线性造成的损伤。特别是，我们将研究使用PSK， QAM和基于偏振的技术的适当组合的新技术。相干检测将被用于提高频谱效率。我们将研究由新型高非线性光纤制成的光纤参量放大器（OPAs）和离散放大器。这些纤维的非线性系数将超过当今最非线性纤维的几个数量级。这些光纤将使新型非线性放大器的发展成为可能，单个器件的增益带宽覆盖1200-1700 nm窗口的大部分。与目前的版本相比，这些设备还将使用更短的光纤和更低的泵浦功率，因此可能在相对较短的时间内实现实际应用。

We propose to develop technologies which will enable communication on a singleoptical fiber at rates in excess of 100 Tb/s within a few years. To accomplish this in thelow-loss window of silica fibers (1200-1700 nm), there will be a need for novel verywideband devices, particularly optical amplifiers. In addition, modulation techniques withspectral efficiencies well in excess of unity will be needed. Our research activities will becentered in these two areas. We will investigate modulation techniques, and associated detection schemes,suitable to obtain a spectral efficiency of 4 b/s/Hz by the end of the project. Thetechniques will be designed to be resistant to impairments due to PMD and fibernonlinearities. In particular, we will investigate novel techniques using appropriatecombinations of PSK, QAM, and polarization-based techniques. Coherent detection willbe utilized where indicated to boost spectral efficiency.We will investigate fiber optical parametric amplifiers (OPAs) and discreteRaman amplifiers made from novel highly-nonlinear fibers. These fibers will havenonlinearity coefficients exceeding those of today's most nonlinear fibers by severalorders of magnitude. These fibers will enable the development of novel nonlinearamplifiers , with gain bandwidth of a single device covering most of the 1200-1700 nmwindow. These devices will also use shorter fibers and lower pump powers than theircurrent versions, and may thus lead to practical applications in a relatively short time.