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Related Experiment Video

Updated: May 15, 2026

Writing Bragg Gratings in Multicore Fibers

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

Large-effective-area uncoupled few-mode multi-core fiber.

Yusuke Sasaki¹, Katsuhiro Takenaga, Ning Guan

¹Optics and Electronics Laboratory, Fujikura Ltd, 1440 Mutsuzaki, Sakura, Chiba 285-8550, Japan. yusuke.sasaki@jp.fujikura.com

|December 25, 2012

Summary

This summary is machine-generated.

Few-mode multi-core fibers (FM-MCF) were designed for two-mode transmission, supporting LP(01) and LP(11) modes. Optimized core pitch minimized crosstalk, ensuring reliable C- and L-band performance over long distances.

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Area of Science:

Optical communications
Photonics
Fiber optics

Background:

Few-mode multi-core fibers (FM-MCF) offer potential for increased data transmission capacity.
Managing mode properties and inter-core crosstalk is crucial for FM-MCF performance.

Purpose of the Study:

To numerically analyze and experimentally confirm the characteristics of FM-MCF.
To design FM-MCF supporting LP(01) and LP(11) modes with minimal bending loss and crosstalk.
To evaluate the transmission performance of fabricated FM-MCF over C- and L-bands.

Main Methods:

Numerical analysis of FM-MCF characteristics.
Design optimization of core pitch to minimize inter-core crosstalk for LP(11) modes.
Experimental fabrication and characterization of FM-MCF.
Measurement of effective area, transmission bands, and crosstalk after propagation.

Main Results:

FM-MCF confirmed to support two-mode transmission (LP(01) and LP(11)) over C- and L-bands.
Effective area of LP(01) mode measured at approximately 110 μm² at 1550 nm.
Crosstalk estimated below -30 dB at 1550 nm after 100-km propagation.
Measured wavelength dependence of crosstalk matched well with simulated results.

Conclusions:

The designed FM-MCF exhibits excellent two-mode transmission characteristics.
Optimized core pitch effectively suppresses inter-core crosstalk.
The fabricated FM-MCF is suitable for high-capacity optical communication systems.