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Simulation and research of few-mode optical fiber DMD degradation due to geometry deviation from optimized form

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Abstract

This work presents an alternative fast and simple method for the design of a graded refractive index profile of silica few-mode optical fibers (FMFs) with enlarged core diameter that extremely improves mode effective area, and low differential mode delay (DMD). We demonstrate some results of refractive index profile optimization for 16-LP-mode FMF with enlarged core diameter up to 42 μm and mode effective area more 130 μm2 under DMD reduction less 120 ps/km all over “C”-band and less 40 ps/km at λ = 1550 nm region. We also propose approach for simulation of the deviation of “real” optical fiber geometry from the optimized form and rigorous method for analysis of large core complicated optical fiber. Here, FMF core asymmetrical ellipticity together with the refractive index profile distortions were considered. They were set and simulated by data from reports of the real commercially available laser-optimized multimode optical fibers of TIA/ISO Cat. OM2+/OM3 refractive index profile measurements, performed by lab optical fiber analyzer kit. We present results of researches of considered FMF DMD spectral curve degradation due to described core geometry deviation from the optimized form. It was noticed, that unlike to only refractive index local fluctuations, FMF core non-circularity strongly distorts higher-order mode field distribution that affects to spectral mode delay curves and may lead to critical total DMD increasing.

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Acknowledgements

The reported study was funded by RFBR according to the research Project No. 16-37-60015 mol_a_dk.

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Authors and Affiliations

  1. Department of Communications Lines, Povolzhskiy State University of Telecommunications and Informatics (PSUTI), 23, Lev Tolstoy Str., Samara, Russia, 443010

    Anton V. Bourdine & Vladimir A. Burdin

  2. “OptoFiber Lab” LLC, #9, Build. 4, Lugovaya Str., Skolkovo Innovation Center, Moscow, Russia, 143026

    Anton V. Bourdine

  3. Department of Telecommunications, Ufa State Aviation Technical University, 12, Karl Marx Str., Ufa, Bashkortostan Rep., Russia, 450077

    Oleg R. Delmukhametov

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  1. Anton V. Bourdine
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  2. Vladimir A. Burdin
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Correspondence to Anton V. Bourdine.

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This article is part of the Topical Collection on Optical Wave and Waveguide Theory and Numerical Modelling, OQTNM 2018.

Guest Edited by Stefan Helfert, Manfred Hammer, Dirk Schulz.

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Bourdine, A.V., Burdin, V.A. & Delmukhametov, O.R. Simulation and research of few-mode optical fiber DMD degradation due to geometry deviation from optimized form. Opt Quant Electron 51, 153 (2019). https://doi.org/10.1007/s11082-019-1872-2

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