Multicore Fibers

Single Mode & Multimode Fibers

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Based on our original telecom experience of making Twincore fibers for the Add/drop mutiplexers, iXblue in collaboration with Photonics Bretagne is now offering Multicore fibers for shape and temperature/strain sensing.

Multicore fibers can be used in a large variety of sensing application where the need to reduce the global footprint is also required for cables and connectors.

Multicore fibers have photosensitive cores, allowing Fiber Bragg Grating (FBG) inscription and can be tailored to match the exact customer specifications.


Benefits & Features

  • Multiple cores
  • Photosensitive core for FBG inscription
  • Suitable when reduced space is required
  • Custom designs possible from 4 to 12 cores
  • Active & rare earth doped multicore fiber on request


  • Shape sensing
  • Temperature and Strain Sensors
  • Telecoms

Main Specifications



Fiber type
Product Specification Datasheet
Active Fibers
IXF-MC-2-EDF-PAS-125-024 2 cores Er-doped & passive PDF More info
IXF-MC-4-EDF-FGC-980 4 cores Er doped PDF More info
IXF-2CF-MC-12-EY-6 12 cores Er/Yb co-doped PDF More info
Passive Fibers
IXF-MC-4-SM-1060 4 cores
Fan-out available on demand
PDF More info
IXF-MC-7-SM-1550 7 cores
Fan-out available on demand
PDF More info
IXF-MC-12-PAS-6 12 cores
Fan-out available on demand
PDF More info
IXF-2CF-MC-12-PAS-6 12 cores
Double clad
PDF More info


  • Power efficient all-fiberized 12-core erbium/ytterbium doped optical amplifier

    G. Mélin, T. Robin (iXblue); R. Kerampran, S. Bordais (Lumibird); A. Monteville, D. Landais, T. Taunay (Photonics Bretagne); A. Lebreton, Y. Jaouën (TELECOM Paris)

    Optical Fiber Communication Conference and Exhibition (OFC) – March 2020

    20dB gain in C-band with only 5.3W of pump is achieved with an all-fiberized 12-core Er/Yb doped fiber amplifier. This result is a first step towards SDM transmission including power efficient amplifiers and ROADM.

  • FIFO-less Core-pump Combiner for Multicore Fiber Amplifier

    Y. Wakayama, N. Yoshikane & T. Tsuritani

    Optical Fiber Communication Conference and Exhibition (OFC) – June 2021

    We demonstrate a core-pumping scheme for multicore EDFA with cascaded side-polished fiber couplers for the first time. The pump coupling ratio exceeds 70% while keeping signal coupling less than 10%.

    Learn more

Application Notes

iXblue Multicore fiber offering

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