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Long-Reach PON Based on SSB Modulated Frequency-Shifted QAM and Low-Cost Direct-Detection Receiver with Kramers–Kronig Scheme

  • Xiang Gao
  • Bo XuEmail author
  • Yuancheng Cai
  • Mingyue Zhu
  • Jing Zhang
  • Kun Qiu
Conference paper
Part of the Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering book series (LNICST, volume 262)

Abstract

As PON systems move towards terabit/s aggregated data rates with longer transmission distance, optical coherent receivers become preferred due to their high tolerance to power fading from fiber transmission. To solve the high complexity and high cost problems of optical coherent receivers, a scheme for complex QAM signal transmission with simple direct detection is recommended in this paper. The scheme based on optical SSB modulation with frequency-shifted QAM signals and low-cost single-ended PD provides an efficient low-cost solution for long reach coherent PON. Due to its minimum phase property of the optical SSB modulated signal, Kramers-Kronig scheme can be used to reconstruct the complex QAM signal from the received intensity signal. The efficiency of the proposed scheme is validated by both numerical simulations and experiments for both QPSK and 16-QAM modulated signals. By using standard commercially available components, the experiments demonstrated that the combination of SSB modulation of frequency-shifted QAM signal and its single-ended PD receiver with KK scheme can support SSMF transmission over 75 km for both QPSK and 16-QAM signals with receiver optical power penalty less than 1.5 dB.

Keywords

Fiber optics communication Modulation Optical communications 

Notes

Acknowledgements

This work is supported by the National Natural Science Foundation of China (#61471088).

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Copyright information

© ICST Institute for Computer Sciences, Social Informatics and Telecommunications Engineering 2019

Authors and Affiliations

  • Xiang Gao
    • 1
  • Bo Xu
    • 1
    Email author
  • Yuancheng Cai
    • 1
  • Mingyue Zhu
    • 1
  • Jing Zhang
    • 1
  • Kun Qiu
    • 1
  1. 1.School of Information and Communication Engineering, Key Laboratory of Optical Fiber Sensing and Communications (Education Ministry of China)University of Electronic Science and Technology of ChinaChengduChina

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