Large-mode-area leaky optical fibre fabricated by MCVD

TL;DR

This paper reports the fabrication of a large-mode-area single-mode optical fiber using MCVD, employing a leaky mode filtering design to discriminate modes and achieve a Gaussian-like mode with a 22-μm MFD after 3 meters.

Contribution

It introduces a novel large-mode-area fiber design with leaky mode filtering fabricated by MCVD, demonstrating effective mode discrimination and propagation characteristics.

Findings

Achieved a 25-μm core diameter with single-mode operation.

Observed a Gaussian-like mode with 22-μm MFD after 3 meters.

Modeling results agree with experimental observations.

Abstract

A large mode area single-mode optical fibre based on leaky mode filtering was prepared by MCVD. The cladding structure discriminates the fundamental mode from the higher order ones. A preliminary version has 25-$\mu$m core diameter and 0.11 numerical aperture. A Gaussian-like mode with 22-$\mu$m MFD is observed after 3-m propagation, in agreement with modeling.