Chromatic Dispersion, Nonlinear Parameter, and Modulation Format Monitoring Based on Godard's Error for Coherent Optical Transmission Systems

  • Lin Jiang
  • , Lianshan Yan
  • , Anlin Yi
  • , Yan Pan
  • , Ming Hao
  • , Wei Pan
  • , Bin Luo
  • , Yves Jaouen

Research output: Contribution to journalArticlepeer-review

Abstract

This paper considers Godard's error as signal quality metric to monitor chromatic dispersion (CD), nonlinear parameter, and modulation format in the DSP module of the coherent receivers. We first review a CD monitoring based on Godard's error that can be able to accurately monitor arbitrarily large dispersion values in uncompensated transmission links in combination with frequency domain equalizer, then extend the previous nonlinear parameter monitoring method based on Godard's error by blindly obtaining the optimized value γξp to significantly improve the adaptive capability, and present a simple and effective modulation format monitoring based on Godard's error. Meanwhile, the effectiveness has been experimentally verified in 128-Gb/s PDM-QPSK, 192-Gb/s PDM-8QAM, and 256-Gb/s PDM-16QAM systems.

Original languageEnglish
Article number8240967
JournalIEEE Photonics Journal
Volume10
Issue number1
DOIs
Publication statusPublished - 1 Feb 2018
Externally publishedYes

Keywords

  • Digital signal processing
  • chromatic dispersion estimation
  • coherent detection.
  • modulation format monitoring
  • nonlinearity compensation
  • optical performance monitoring

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