Fiber Vector Eigenmode Multiplexing based High Capacity Transmission over 5-km FMF with Kramers-Kronig Receiver

Jianbo Zhang, Xiong Wu, Jianping Li, Linyue Lu, Jiajing Tu, Zhaohui Li, Chao Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

Abstract

Vector modes (VMs) with spatially nonhomogeneous polarization patterns, combining polarization and spatial-mode degrees of freedom together, are regarded as the eigenmodes of optical fiber. Such eigenmodes have potential to be used to implement the high capacity spatial division multiplexing (SDM)/mode division multiplexing (MDM) based optical fiber communication systems. Here, we respectively demonstrate 2 VMs of the same order (<i>l</i> = +2, EH11o and EH11e modes) and 2 VMs of different orders (<i>l</i> = 0, HE11o mode and <i>l</i> = +2, EH11e mode) multiplexing transmissions over 5-km few-mode fiber (FMF). The mode crosstalk after FMF transmission has been minimized to prepare high capacity signal transmission without multiple-input-multiple-output (MIMO) digital signal processing (DSP). To increase the transmission capacity and decrease the system cost, the Kramers-Kronig (KK) receiver has been employed and the single-wavelength two sets of eigenmodes multiplexed 360 Gbit/s and 400 Gbit/s signal transmissions over 5-km FMF link are realized, respectively. Then, to further burst the transmission capacity, 2 vector-mode-division-multiplexing channels (HE11o and EH11e modes) in combination of 5 wavelength-division-multiplexing (WDM) channels with a total of 10 parallel channels have been demonstrated. A total data rate of 1.12 Tbit/s with 28 GBaud 16-state quadrature amplitude modulation (QAM) signal has been realized over the 5-km FMF. In all data-carrying experimental demonstrations, the bit-error rate (BER) performance of each VM channel is below the 7 % hard decision forward error correction threshold (FEC) at BER of 3.810<sup>-3</sup>. The experimental results highlight that the VMDM-based optical transmission technology could find enormous potential in huge-capacity short-reach optical interconnects.

Original languageEnglish
Article number9428576
Pages (from-to)4932-4938
Number of pages7
JournalJournal of Lightwave Technology
Volume39
Issue number15
DOIs
Publication statusPublished - 1 Aug 2021

Keywords

  • Kramers-Kronig (KK) receiver
  • mode division multiplexing (MDM)
  • Optical crosstalk
  • Optical fiber communication
  • Optical fiber networks
  • Optical fiber polarization
  • Optical fibers
  • Optical polarization
  • Optical receivers
  • vector mode (VM)
  • wavelength division multiplexing (WDM)

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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