Digital signal processing approaches for semiconductor phase noise tolerant coherent transmission systems

Miguel Iglesias Olmedo, Xiaodan Pang, Richard Schatz, Darko Zibar, Idelfonso Tafur Monroy, Gunnar Jacobsen, Sergei Popov

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Abstract

We discuss about digital signal processing approaches that can enable coherent links based on semiconductor lasers. A state-of-the art analysis on different carrier-phase recovery (CPR) techniques is presented. We show that these techniques are based on the assumption of lorentzian linewidth, which does not hold for monolithically integrated semiconductor lasers. We investigate the impact of such lineshape on both 3 and 20 dB linewidth and experimentally conduct a systematic study for 56-GBaud DP-QPSK and 28-GBaud DP-16QAM systems using a decision directed phase look loop algorithm. We show how carrier induced frequency noise has no impact on linewidth but a significant impact on system performance; which rises the question on whether 3-dB linewidth should be used as performance estimator for semiconductor lasers.
Original languageEnglish
Title of host publicationProceedings of the SPIE
Number of pages7
Volume9388
PublisherSPIE - International Society for Optical Engineering
Publication date2015
Article number93880A
DOIs
Publication statusPublished - 2015
EventSPIE Photonics West 2015: Optical Metro Networks and Short-Haul Systems VII - The Moscone Center, San Francisco, United States
Duration: 7 Feb 201512 Feb 2015
Conference number: 9388

Conference

ConferenceSPIE Photonics West 2015: Optical Metro Networks and Short-Haul Systems VII
Number9388
LocationThe Moscone Center
CountryUnited States
CitySan Francisco
Period07/02/201512/02/2015
SeriesProceedings of SPIE, the International Society for Optical Engineering
Volume9388
ISSN0277-786X

Bibliographical note

Copyright 2015 Society of Photo Optical Instrumentation Engineers. One print or electronic copy may be made for personal use only. Systematic electronic or print reproduction and distribution, duplication of any material in this paper for a fee or for commercial purposes, or modification of the content of the paper are prohibited.

Keywords

  • Optical communications
  • Coherent communications
  • Phase Noise

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