| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 6888334 | Optical Fiber Technology | 2018 | 8 Pages |
Abstract
This paper investigates the design details of cladding rods-assisted (CRA) depressed-core (DC) few-mode fibers (FMFs) that feature more equally spaced linearly polarized (LP) modal effective indices, suitable for high-spatial-density weakly-coupled mode-division multiplexing systems. The influences of the index profile of cladding rods on LP mode-resolved effective index, bending sensitivity, and effective area Aeff, are numerically described. Based on the design considerations of LP modal Aeff-dependent spatial efficiency and LP modal bending loss-dependent robustness, the small LP21-LP02 and LP22-LP03 modal spacing limitations, encountered in state-of-the-art weakly-coupled step-index FMFs, have been substantially improved by at least 25%. In addition, the proposed CRA DC FMFs also show sufficiently large effective areas (in excess of 110â¯Î¼m2) for all guided LP modes, which are expected to exhibit good nonlinear performance.
Keywords
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Physical Sciences and Engineering
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Computer Networks and Communications
Authors
Jiawei Han, Jie Zhang,