• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文学位 >Fiber-Optic Communications with Advanced Modulation Formats for Datacenter Networks.
【24h】

Fiber-Optic Communications with Advanced Modulation Formats for Datacenter Networks.

机译：用于数据中心网络的具有高级调制格式的光纤通信。

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

It is an obvious trend in our daily life that the world is more and more digitized and connected. It took the human race thousands of years to build the physical world that we are in today, but we have now created a ``virtual'' world in less than half a century. It is made possible because of the deepest understanding in physics and information. We can store all books that were written in human history in just several hard drives. But even then, the digital world has grown so large that it is now starting to show an impact on the physical world, reflected most noticeably by the physical size and power consumption of modern datacenters. It requires information technology to be even more efficient in every way.;Datacenters, where centralized computing is performed by thousands of servers, require enormous bandwidth for internal networking as well as input/output. In order to increase capacity per optical wavelength, coherent fiber-optic communications with advanced modulation formats has being developed to increase the spectral efficiency (SE). It is made possible by advances in electronics especially digital signal processing (DSP). High order quadrature amplitude modulation (QAM) formats which are commonly seen in radio frequency (RF) communication systems, are now at the research frontier for fiber-optic communications. Large constellation such as 256-QAM could provide 8-fold capacity increase over conventional systems with on-off keying (OOK) modulation format at the same modulation speed. However, high order QAM signals require higher signal-to-noise ratio (SNR) and are more vulnerable to fiber impairments such as nonlinearities.;In this dissertation we thoroughly studied the principle, implementation and qualification of high order QAM formats in fiber-optic communications, and we demonstrated a dual-channel 96~Gb/s 256-QAM signal transmission over 50~km standard single-mode fiber (SSMF). The link BER was 4 x 10 --4 which is below the forward error correction (FEC) threshold. We studied fiber nonlinear effects such as self-phase modulation (SPM) and cross-phase modulation (XPM) on high order QAM signals. We experimentally determined the nonlinear power thresholds for various conditions such as different transmission distances. Meanwhile, we also explored incorporating advanced modulation formats with ultra-fast optical time-division multiplexing (OTDM) systems. We demonstrated a 64-QAM OTDM experiment and discussed the technical challenges. These results are valuable to our understanding of the system limitations and will help guiding future high SE system design. This technology could enable ultra-high speed optical Ethernet beyond Terabit/s for future datacenter networks.
机译：世界的数字化和联系日益紧密是我们日常生活中的一个明显趋势。人类花了数千年的时间建立了今天的物理世界，但现在我们在不到半个世纪的时间里创建了一个“虚拟”世界。由于对物理和信息的最深刻理解，才使之成为可能。我们可以将人类历史上写的所有书籍存储在几个硬盘中。但是即使那样，数字世界也已经变得如此庞大，以至于它现在开始对物理世界产生影响，最明显的体现是现代数据中心的物理大小和功耗。它要求信息技术在各个方面都必须更加高效。数据中心（由数千台服务器执行集中计算）需要巨大的带宽用于内部网络以及输入/输出。为了增加每个光波长的容量，已经开发了具有高级调制格式的相干光纤通信以提高频谱效率（SE）。电子学尤其是数字信号处理（DSP）的进步使之成为可能。射频（RF）通信系统中常见的高阶正交幅度调制（QAM）格式现已成为光纤通信的研究前沿。像256-QAM这样的大型构架可以在相同的调制速度下将传统的具有开关键控（OOK）调制格式的系统的容量提高8倍。然而，高阶QAM信号要求较高的信噪比（SNR），并且更容易受到诸如非线性等光纤损伤的影响。本文对光纤中高阶QAM格式的原理，实现和验证进行了深入研究。通讯，我们展示了在50〜km标准单模光纤（SSMF）上的双通道96〜Gb / s 256-QAM信号传输。链路BER为4 x 10 --4，低于前向纠错（FEC）阈值。我们研究了光纤非线性效应，例如高阶QAM信号的自相位调制（SPM）和交叉相位调制（XPM）。我们通过实验确定了各种条件（例如不同的传输距离）的非线性功率阈值。同时，我们还探索了将先进的调制格式与超快速光时分复用（OTDM）系统相结合的方法。我们演示了64-QAM OTDM实验并讨论了技术挑战。这些结果对于我们了解系统局限性非常有价值，并将有助于指导未来的高级SE系统设计。该技术可以为将来的数据中心网络提供超过Terabit / s的超高速光以太网。

著录项

  • 作者

    Li, Wenzao.;

  • 作者单位

    University of California, Santa Barbara.;

  • 授予单位 University of California, Santa Barbara.;
  • 学科 Engineering Electronics and Electrical.
  • 学位 Ph.D.
  • 年度 2013
  • 页码 223 p.
  • 总页数 223
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号