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<p>When transmission lengths in multi-core multi-mode fibres (MC-MMFs) are increased, the stochastic disturbance called inter-core crosstalk (IC-CT) has a detrimental effect on signal integrity. Both continuous monitoring systems and quick IC-CT measurement are necessary for SDM systems based on MC-MMF. In order to allow real-time IC-XT monitoring in MC-MMFs, the study presents a supplemental network management and control channel (SNMCC) system. The technique reduces interference with high-speed data transmission by using low-frequency management and control signals. To keep an eye on the signal-carrying core and the crosstalk-affected core, the technique uses two orthogonal sequences. For accurate real-time crosstalk estimate, incoming signals are processed using digital signal processing methods. The simulation findings provide measurement errors below 0.8dB for both homogeneous and heterogeneous crosstalk throughout the C and L bands, validating this monitoring strategy. The proposed method demonstrates promising potential for future SDM systems according to these findings.</p>

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Improved crosstalk real-time monitoring in multi-core multi-mode fibres with additional control and supervision channels

  • 期刊论文

  • 发表日期：

    2025年10月8日

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  • Shivani Goyal,
  • Vishal Jain

摘要

When transmission lengths in multi-core multi-mode fibres (MC-MMFs) are increased, the stochastic disturbance called inter-core crosstalk (IC-CT) has a detrimental effect on signal integrity. Both continuous monitoring systems and quick IC-CT measurement are necessary for SDM systems based on MC-MMF. In order to allow real-time IC-XT monitoring in MC-MMFs, the study presents a supplemental network management and control channel (SNMCC) system. The technique reduces interference with high-speed data transmission by using low-frequency management and control signals. To keep an eye on the signal-carrying core and the crosstalk-affected core, the technique uses two orthogonal sequences. For accurate real-time crosstalk estimate, incoming signals are processed using digital signal processing methods. The simulation findings provide measurement errors below 0.8dB for both homogeneous and heterogeneous crosstalk throughout the C and L bands, validating this monitoring strategy. The proposed method demonstrates promising potential for future SDM systems according to these findings.