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Nonlinear Phase-Shift Compensation for DQPSK Signals Using a Nonlinear Amplifying Loop Mirror

机译：使用非线性放大环镜对DQPSK信号进行非线性相移补偿

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摘要

The application of a Nonlinear Amplifying Loop Mirror (NALM) as a nonlinear phase-shift compensator (NPSC) in phase-shift keyed transmission is investigated with emphasis on Differential Quadrature Phase-Shift Keying (DQPSK). The origin of the effective negative nonlinear phase shift in a NALM and the effects of the NALM parameters on the phase-shift compensation are discussed. Two possible application modes of the NALM as NPSC have been found: sole nonlinear phase-shift compensation up to 3 rad, and phase-shift compensation in a smaller range with simultaneous amplitude equalization. The points of operation for both modes and the limitations in their implementation are presented. Results show that the use of a NALM, optimized for phase-shift compensation, seems to be very promising, especially for the application as post-compensator in differential phase-shift-keyed transmission systems. To evaluate the performance of a NALM as post-compensator a simplified model of the NALM and a DQPSK transmission system was used. The BER with and without the NALM was calculated in dependence on the average nonlinear phase shift and on the input noise. The results show that with a NALM as NPSC the amount of nonlinear phase shift in a preceding transmission system can be approximately doubled for the same BER.
机译：重点研究了差分正交相移键控（DQPSK），研究了非线性放大环镜（NALM）作为非线性相移补偿器（NPSC）在相移键控传输中的应用。讨论了NALM中有效负非线性相移的起源以及NALM参数对相移补偿的影响。已经找到了NALM作为NPSC的两种可能的应用模式：唯一的高达3 rad的非线性相移补偿，以及在同时幅度均衡的较小范围内的相移补偿。介绍了两种模式的操作要点及其实现的局限性。结果表明，针对相移补偿进行了优化的NALM的使用似乎非常有前途，特别是对于差分相移键控传输系统中的后补偿器应用。为了评估NALM作为后补偿器的性能，使用了NALM和DQPSK传输系统的简化模型。根据平均非线性相移和输入噪声，计算有无NALM的BER。结果表明，使用NALM作为NPSC，对于相同的BER，先前传输系统中的非线性相移量可以近似加倍。

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  • 来源
    《Laser optics 2010》|2010年|p.782204.1-782204.5|共5页
  • 会议地点 St. Petersburg(RU)
  • 作者

    Klaus Sponsel; Christian Stephan; Georgy Onishchukov; Bernhard Schmauss; Gerd Leuchs;

  • 作者单位

    Max Planck Institute for the Science of Light, Erlangen, Germany,Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg, Erlangen;

    Max Planck Institute for the Science of Light, Erlangen, Germany,Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg, Erlangen,Chair for Microwave Engineering, University of Erlangen-Nuremberg, Erlangen, Germany;

    Max Planck Institute for the Science of Light, Erlangen, Germany,Chair for Microwave Engineering, University of Erlangen-Nuremberg, Erlangen, Germany;

    Chair for Microwave Engineering, University of Erlangen-Nuremberg, Erlangen, Germany,Erlangen Graduate School in Advanced Optical Technologies, Erlangen, Germany;

    Max Planck Institute for the Science of Light, Erlangen, Germany,Institute of Optics, Information and Photonics, University of Erlangen-Nuremberg, Erlangen,Chair for Microwave Engineering, University of Erlangen-Nuremberg, Erlangen, Germany;

  • 会议组织
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 激光技术、微波激射技术;
  • 关键词

    nonlinear optics; fiber optics communication; optical regeneration; all-optical devices; nonlinear optical loop mirror; nonlinear phase noise;

    机译：非线性光学光纤通讯；光学再生全光器件；非线性光学环镜；非线性相位噪声;

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