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Low-Loss Ring-Core Fiber Supporting 4 Mode Groups

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Abstract

A ring-core fiber with a novel modulated-refractive-index profile is reported, whose low attenuation (~0.2 dB/km) and low inter-mode-group coupling coefficient (<-36 dB/km for adjacent high-order mode groups), both setting records for a ring-core fiber.

© 2019 The Author(s)

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