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

我们建议开发技术，使通信在一个单一的光纤在几年内超过100 Tb/s的速率。为了在石英光纤的低损耗窗口（1200-1700 nm）中实现这一点，将需要新型的超宽带器件，特别是光放大器。此外，调制技术与频谱效率远远超过单位将是必要的。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，适合获得4 B/s/Hz的频谱效率的项目结束。该技术将被设计为抵抗由于PMD和光纤非线性的损害。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。相干检测将被用来提高光谱效率。我们将研究光纤光学参量放大器（OPA）和离散拉曼放大器由新型的高度非线性光纤。这些光纤的非线性系数将超过当今大多数非线性光纤的几个数量级。这些光纤将使新型非线性放大器的开发成为可能，单个器件的增益带宽覆盖了1200-1700 nm窗口的大部分。这些设备也将使用较短的光纤和较低的泵浦功率比他们目前的版本，并因此可能导致在相对较短的时间内实际应用。

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.