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Mode Coupling Effects in Ring-Core Fibers for Space-Division Multiplexing Systems

Jin, X; Gomez, A; Shi, K; Thomsen, BC; Feng, F; Gordon, GSD; Wilkinson, TD; ... Payne, FP; + view all (2016) Mode Coupling Effects in Ring-Core Fibers for Space-Division Multiplexing Systems. Journal of Lightwave Technology , 34 (14) pp. 3365-3372. 10.1109/JLT.2016.2564991. Green open access

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Abstract

An optical fiber with weak mode coupling is desirable for future ultrahigh capacity space-division multiplexing (SDM) systems because mode coupling in an optical fiber results in extrinsic loss of the fiber and crosstalk between guided optical modes. To study the feasibility of a ring-core fiber (RCF) for SDM systems, in this paper, we investigate the mode coupling in the RCF supporting five or seven guided mode groups (MGs) at a wavelength of 1550 nm. For this purpose, the coupled mode/power theory with identified spatial power spectrum of random perturbations of fiber axis is used to estimate the bend loss/crosstalk of the RCF due to microbending. It is shown that based on the identified parameters for the spatial power spectrum in the 5/7-MG RCF, the estimated bend loss/crosstalk of the RCF agrees well with experimental results. In addition, the impact of the gradient parameter α and refractive index contrast Δ of the fiber refractive index profile on bend loss and crosstalk of the RCF is explored. Simulation results indicate that the Δ instead of the α significantly affects bend loss and crosstalk of the RCF. The magnitude improvement in bend loss by increasing the Δ is dependent on the spatial power spectrum.

Type: Article
Title: Mode Coupling Effects in Ring-Core Fibers for Space-Division Multiplexing Systems
Open access status: An open access version is available from UCL Discovery
DOI: 10.1109/JLT.2016.2564991
Publisher version: http://dx.doi.org/10.1109/JLT.2016.2564991
Language: English
Additional information: © 2016 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other users, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works.
Keywords: Science & Technology, Technology, Physical Sciences, Engineering, Electrical & Electronic, Optics, Telecommunications, Engineering, Coupled mode/power theory, crosstalk, mode coupling, microbending, ring-core fiber, space-division multiplexing, OPTICAL-FIBERS, SINGLE-MODE, MULTIMODE, INDEX, TRANSMISSION, LOSSES, DESIGN
UCL classification: UCL
UCL > Provost and Vice Provost Offices > UCL BEAMS
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science
UCL > Provost and Vice Provost Offices > UCL BEAMS > Faculty of Engineering Science > Dept of Electronic and Electrical Eng
URI: https://discovery.ucl.ac.uk/id/eprint/1518042
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