Mitigating the inter-core crosstalk of multicore fiber transmission by orthogonal filtering

Lin Sun, Gordon Ning Liu, Yi Cai, Jiangbing Du, Zuyuan He, Zhaohui Li, Chao Lu, Gangxiang Shen

Research output: Journal article publicationJournal articleAcademic researchpeer-review


We for the first time proposed to utilize the orthogonal filtering technique to suppress the inter-core crosstalk (IC-XT) in multicore fiber (MCF) transmission. It could simplify the implementation of weakly-coupled MCF (WC-MCF) signal reception without multiple-input and multiple-output (MIMO) digital signal processing, by extracting the individual lanes separately. Effective IC-XT mitigation using a pair of orthogonal filters are demonstrated for MIMO-free 2-core MCF transmitted signal receptions. 600-Gbps 64-QAM (quadrature amplitude modulation) signal transmission over 100-km MCF is emulated by constructing a concrete transmission model based on coupled nonlinear Schrodinger equations. Maximum Q factor improvement of 6 dB can be achieved using orthogonal matching filters to suppress IC-XT at -10dB. The effect of spatial mode dispersion on the filter orthogonality performance is also analyzed.

Original languageEnglish
Article number9893163
Pages (from-to)1373-1376
Number of pages4
JournalIEEE Photonics Technology Letters
Issue number24
Publication statusPublished - 15 Dec 2022


  • Integrated optics
  • inter-core crosstalk
  • Multicore fibers
  • Optical fiber couplers
  • Optical fiber dispersion
  • Optical fiber filters
  • Optical fibers
  • Optical receivers
  • orthogonal filtering
  • Q-factor

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering


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