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Investigation of degrading effects and performance optimization in long-haul WDM transmission systems and reconfigurable networks.

机译：研究长距离WDM传输系统和可重构网络中的降级效果和性能优化。

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摘要

Optical signals experience various degrading effects in optical fiber transmission systems and reconfigurable networks. Among those the most important effects include chromatic dispersion, fiber nonlinearities, polarization-related impairments such as polarization mode dispersion (PMD) and polarization dependent loss (PDL), as well as their mutual or combined effects. Depending upon the signal nature (analog or digital, as well as different data formats) and system's structure (reconfigurable network or point-to-point transmission), the way to improve or optimize system performance may be different.; Recirculating fiber loop testbed is a powerful tool to investigate different perspectives in typical optically amplified long-haul or ultra-long-haul (ULH) systems by sending optical signals through a certain length fiber repeatedly. Most of the study in this dissertation is based on the testbed with different system parameters or configurations.; Polarization-related impairments became a big hurdle to high performance systems, especially when the data rate increases to >10-Gb/s/channel. Both PMD and PDL can induce statistical system fluctuations, and enhanced degradations will happen due to their interaction. Using a loop-synchronized polarization scrambling technique, we replicate a distributed long-haul link with accurate polarization statistics. Thus we are able to show experimentally two major degrading effects due to PMD and PDL: (i) combined effects of PMD and PDL, and (ii) degrading effects due to low frequency polarization scrambling in the presence of PDL.; The major part of this dissertation is performance optimization where we show different approaches to (i) overcome the limitations due to fiber dispersion and nonlinearities using pulse-width management for return-to-zero (RZ) systems, (ii) combat PMD and PDL effects by applying dynamic monitoring, optical compensation and electronic mitigation. The advanced methods of PMD emulation, including both the variable first-order emulator and all-order emulator with tunable statistics, have been presented with a further emphasis of experimental realization of importance Sampling.; Although external modulation is the dominating technique in long-haul systems, we also investigate the feasibilities of direct modulation into 10-Gb/s long-haul transmission systems and 40-Gb/s systems using asymmetric narrow-band optical filtering at the transmitter or the receiver.
机译：在光纤传输系统和可重新配置的网络中，光信号会遭受各种性能下降的影响。其中最重要的影响包括色散，光纤非线性，与偏振相关的损伤（例如偏振模色散（PMD）和偏振相关损耗（PDL））以及它们的相互影响或组合影响。根据信号的性质（模拟或数字以及不同的数据格式）和系统的结构（可重新配置的网络或点对点传输），改善或优化系统性能的方法可能有所不同。循环光纤环路测试台是一种强大的工具，可以通过重复地通过一定长度的光纤发送光信号来研究典型的光放大长距离或超长距离（ULH）系统中的不同角度。本文的大部分研究都是基于具有不同系统参数或配置的测试平台。与极化相关的损伤成为高性能系统的一大障碍，尤其是当数据速率增加到> 10 Gb / s /通道时。 PMD和PDL都可能引起统计系统波动，并且由于它们之间的交互作用，将会导致性能下降。使用环路同步极化加扰技术，我们复制了具有精确极化统计信息的分布式长距离链路。因此，我们能够通过实验证明由于PMD和PDL而产生的两种主要的降解作用：（i）PMD和PDL的综合作用，以及（ii）由于存在PDL时的低频极化扰乱而产生的降解作用。本文的主要部分是性能优化，其中我们展示了不同的方法来（i）克服归零（RZ）系统使用脉冲宽度管理的光纤色散和非线性带来的限制，（ii）对抗PMD和PDL通过动态监控，光学补偿和电子缓解来达到效果。提出了PMD仿真的高级方法，包括可变一阶仿真器和具有可调统计量的全序仿真器，并进一步强调了重要性采样的实验实现。尽管外部调制是长距离系统中的主要技术，但我们还研究了在发射器或接收器上使用非对称窄带光学滤波直接调制到10 Gb / s长距离传输系统和40 Gb / s系统中的可行性。收件人。

著录项

  • 作者

    Yan, Lianshan.;

  • 作者单位

    University of Southern California.;

  • 授予单位 University of Southern California.;
  • 学科 Engineering Electronics and Electrical.; Physics Optics.
  • 学位 Ph.D.
  • 年度 2005
  • 页码 255 p.
  • 总页数 255
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 无线电电子学、电信技术;光学;
  • 关键词

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