GOALI: A comprehensive study of nonlinear phenomena in multimode optical fibers for enhancing the performance of optical communication systems

目标：全面研究多模光纤中的非线性现象，以提高光通信系统的性能

• 批准号: 1505636
• 负责人: Govind Agrawal
• 金额: $ 38.46万
• 依托单位: University of Rochester
• 依托单位国家: 美国
• 项目类别: Standard Grant
• 财政年份: 2015
• 资助国家: 美国
• 起止时间: 2015-08-01 至 2019-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=1505636&HistoricalAwards=false
• 关键词: GOALI; comprehensive; study; nonlinear; phenomena

Title: GOALI: A comprehensive study of nonlinear phenomena in multimode optical fibers for enhancing the performance of optical communication systemsAbstract:The use of optical fibers for transmitting information over long distances has made the spread of the Internet possible. The advent of a technique, known as wavelength-division multiplexing, helped in increasing the capacity of fiber-based communication systems during the decades of the 1990s and 2000s. However, current systems will not be able to meet the continuing increase in the data rates fueled by such activities as on-line learning and video streaming. A new technique, called space-division multiplexing (SDM), is being studied in the laboratories worldwide to meet this demand. It makes use of optical fibers that are designed to support multiple spatial modes either by using a single large-size core or several narrower cores, each supporting a single mode. However, before the SDM technique can be implemented in real systems, it is necessary to understand the impact of various nonlinear effects occurring inside a multimode fiber, or a multicore fiber whose cores are coupled in view of their close proximity. This is what the proposed research project will accomplish.The main goal of the proposed research is to develop and implement new theoretical and numerical tools for modeling the simultaneous propagation of multiple data streams through SDM inside a multicore or a multimode fiber. These tools will be used to develop a fundamental understanding of how each SDM channel is affected by other co-propagating channels in the presence of various nonlinear effects such as self-phase modulation, cross-phase modulation, stimulated Raman scattering, and four-wave mixing. Even though the modes of an ideal fiber should not be coupled to each other, modes of any realistic multimode fiber will experience some random coupling. A major objective of this GOALI project is to understand the origin of this coupling and study how it impacts various nonlinear effects and the performance of SDM systems. In this effort, our industrial partner would be of immense help because of the recent experiments performed at Bell Labs that have quantified the extent of random mode coupling in six-mode fibers. The project has both the fundamental and applied aspects. An improved understanding of the nonlinear phenomena in multimode fibers is of fundamental importance and should help the next generation of graduate students and scientists in coming up with new device ideas. The study of nonlinear effects should also help in designing the future SDM systems. Two graduate students will work with the P.I. on this GOALI project as a part of their Ph.D. thesis. Both of them will spend time each year at the industrial site so that they can acquire valuable industrial experience. This kind of training of the graduate students is ideal for developing the work force for the U.S. telecommunication industry.

标题：目标：对多模光纤中非线性现象的综合研究，以提高光通信系统的性能摘要：使用光纤进行长距离传输信息使互联网的普及成为可能。波分复用技术的出现在 20 世纪 90 年代和 2000 年代的几十年里帮助提高了基于光纤的通信系统的容量。然而，当前的系统将无法满足在线学习和视频流等活动推动的数据速率的持续增长。世界各地的实验室正在研究一种称为空分复用 (SDM) 的新技术来满足这一需求。它使用的光纤旨在通过使用单个大尺寸芯或多个较窄芯（每个芯支持单个模式）来支持多种空间模式。然而，在实际系统中实施SDM技术之前，有必要了解多模光纤或多芯光纤内部发生的各种非线性效应的影响，该多芯光纤的纤芯由于距离很近而耦合。这就是拟议的研究项目将要完成的任务。拟议研究的主要目标是开发和实施新的理论和数值工具，用于对多芯或多模光纤内通过 SDM 的多个数据流的同时传播进行建模。这些工具将用于对在存在各种非线性效应（例如自相位调制、交叉相位调制、受激拉曼散射和四波）的情况下每个 SDM 通道如何受到其他同向传播通道的影响有一个基本的了解。混合。尽管理想光纤的模式不应相互耦合，但任何实际多模光纤的模式都会经历一些随机耦合。该 GOALI 项目的主要目标是了解这种耦合的起源并研究它如何影响各种非线性效应和 SDM 系统的性能。在这项工作中，我们的工业合作伙伴将提供巨大的帮助，因为贝尔实验室最近进行的实验已经量化了六模光纤中随机模式耦合的程度。该项目具有基础和应用两个方面。加深对多模光纤非线性现象的理解至关重要，应该有助于下一代研究生和科学家提出新的器件想法。非线性效应的研究也应该有助于设计未来的 SDM 系统。两名研究生将与 P.I. 一起工作。这个 GOALI 项目是他们博士学位的一部分。论文。他们每年都会在工业现场度过一段时光，以获得宝贵的工业经验。这种研究生培训非常适合培养美国电信行业的劳动力。