Kramers–Kronig Transmission with a Crosstalk-Dependent Step Multiple-Input Multiple-Output Volterra Equalizer in a Seven-Core Fiber

Feng Tian*, Tianze Wu, Chao Yu, Chuxuan Wang, Mohai Yue, Ran Gao, Qi Zhang, Zhipei Li, Qinghua Tian, Fu Wang, Xiangjun Xin

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

2 Citations (Scopus)

Abstract

In this paper, we experimentally demonstrate a net bit rate of 261.7 Gbit/s in a seven-core transmission system with a Kramers–Kronig (KK) receiver. The 10 GBaud 16-level quadrature amplitude modulation (QAM) signal is transmitted over a 2.5 km seven-core fiber, and the relationship between carrier-to-signal power ratio, signal power, frequency spacing, and optical power is analyzed. Moreover, a multiple-input multiple-output (MIMO) Volterra equalization algorithm with crosstalk-dependent steps is proposed to compensate for inter-core crosstalk and impairments induced by other devices. Compared to the single-input single-output (SISO) Volterra equalizer, the CSPR can be reduced by 1.3 dB, and the received power gain can reach up to 0.7 dB.

Original languageEnglish
Article number1017
JournalPhotonics
Volume10
Issue number9
DOIs
Publication statusPublished - Sept 2023

Keywords

  • Kramers–Kronig receiver
  • MIMO
  • Volterra equalizer
  • crosstalk
  • optical fiber communication
  • seven-core transmission

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Tian, F., Wu, T., Yu, C., Wang, C., Yue, M., Gao, R., Zhang, Q., Li, Z., Tian, Q., Wang, F., & Xin, X. (2023). Kramers–Kronig Transmission with a Crosstalk-Dependent Step Multiple-Input Multiple-Output Volterra Equalizer in a Seven-Core Fiber. Photonics, 10(9), Article 1017. https://doi.org/10.3390/photonics10091017