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Related Experiment Video

Updated: Jun 20, 2026

Writing Bragg Gratings in Multicore Fibers

Writing Bragg Gratings in Multicore Fibers

Published on: April 20, 2016

Very-large-mode-area, single-mode multicore fiber.

Moritz M Vogel¹, Marwan Abdou-Ahmed, Andreas Voss

¹Institut für Strahlwerkzeuge (IFSW), Universität Stuttgart, Pfaffenwaldring 43, 70695 Stuttgart, Germany. moritz.vogel@ifsw.uni-stuttgart.de

|September 17, 2009

Summary

This summary is machine-generated.

This study introduces a novel single-mode multicore fiber with 19 cores. The developed fiber demonstrates excellent performance, showing high potential for advanced optical applications.

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Area of Science:

Optical Fiber Technology
Photonics
Materials Science

Background:

Multicore fibers offer increased transmission capacity.
Evanescent coupling enables novel light-guiding properties.
Characterization of multicore fiber performance is crucial for practical applications.

Purpose of the Study:

To investigate a single-mode evanescently coupled multicore fiber with 19 hexagonally arranged cores.
To compare theoretical and experimental results with a hypothetical step-index fiber.
To evaluate the potential of the developed multicore fiber.

Main Methods:

Fabrication and characterization of a 19-core fiber.
Theoretical modeling of evanescent coupling in multicore structures.
Experimental measurement of the fundamental mode properties, including effective area and beam propagation factor (M²).
Comparison with a step-index fiber model.

Main Results:

A fundamental mode was successfully measured in the multicore fiber.
The effective area of the fundamental mode was determined to be 465 μm².
The beam propagation factor (M²) was measured to be 1.02, indicating near-diffraction-limited beam quality.
Experimental results showed good agreement with theoretical predictions.

Conclusions:

The developed single-mode evanescently coupled multicore fiber exhibits promising characteristics.
The measured beam propagation factor (M² ≈ 1.02) highlights the high quality of the fundamental mode.
This fiber design holds significant potential for future optical communication and sensing applications.