Design of Silica Multimode Optical Fibers with Extremely Enlarged Core Diameter for Laser-Based Multi-Gigabit Short-Range Optical Networks

Anton V Bourdine,Ashish Kumar Ghunawat,Ghanshyam Singh,Vijay Janyani,Alexander E Zhukov,Vladimir A Burdin

doi:10.3390/photonics5040037

Abstract

This work presents an alternative fast and simple method for the design of a refractive index profile of silica multimode optical fibers (MMFs) with extremely enlarged core diameters of up to 100 µm for laser-based multi-gigabit short-range optical networks. We demonstrate some results of 100 µm core MMF graded index profile optimization performed by a proposed solution, which provides a selected mode staff differential mode delay (DMD) reduction over the “O”-band under particular launching conditions. Earlier on, a developed alternative model for a piecewise regular multimode fiber optic link operating in a few-mode regime for the computation of laser-excited optical pulse dynamics during its propagation over an irregular silica graded-index MMF with an extremely large core diameter, is utilized to estimate the potentiality of fiber optic links with the described MMFs. Here, we also present the comparison results of the simulation of 10GBase-LX optical signal transmission over 100 µm core MMFs with conventional and optimized graded-index refractive index profiles.

Highlights

Nowadays, laser-based optical signal transmission techniques over silica optical fibers with core diameters enlarged in comparison with standard telecommunication single-mode fibers are widely used in various applications of high-bit-rate optical networks
We propose utilizing a previously developed model of a piecewise regular multimode fiber optic link operating in a few-mode regime to simulate laser-excited optical pulse propagation, and to estimate the potentiality of a 100 μm core multimode optical fibers (MMFs), as well as an optimized 100 μm core low differential mode delay fibers (LDMDFs) for laser-based multi-gigabit data transmission
We utilized a LOMF 50/125 refractive index profile scaled to a 100 μm core diameter as the reference for further computation of the selected guided mode staff differential mode delay (DMD) diagram, to define the5,boundaries of the reference mode delay tREF range

Summary

Introduction

Laser-based optical signal transmission techniques over silica optical fibers with core diameters enlarged in comparison with standard telecommunication single-mode fibers are widely used in various applications of high-bit-rate optical networks. This technique, combined with special launching conditions, provides a few-mode regime, where laser-excited optical emission is transferred over large core optical fibers not by total-mode staff, but only by a limited number of mode components. Since the IEEE 802.3z standard was ratified by the Institute of Electrical and Electronics Engineers (IEEE) in 1998 [1,2], this technique began to be widely used for short-range in-premise multi-gigabit networks, such as cable systems of data and computation centers, storage and local area networks, etc.

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