Journal
JOURNAL OF LIGHTWAVE TECHNOLOGY
Volume 35, Issue 3, Pages 443-449Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JLT.2016.2610479
Keywords
Differentialmode delay; multicore fiber; multiple-input; multiple-output
Funding
- NICT, Japan
- R&D of Innovative Optical Fiber and Communication Technology
- Innovative Optical Communication Infrastructure
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We investigate a few-mode multicore fiber structure suitable for realizing a high spatial density while maintaining a feasible cladding diameter. First, we discuss the impact of cladding diameter on mechanical reliability, and set a target cladding diameter of less than 250 mu m to maintain a comparable reliability to conventional fiber. We then optimize the 6-mode core profile to obtain a low differential mode delay (DMD) characteristic and reveal that a hexagonally arranged 19-core structure can realize more than 100 spatial channels with a cladding diameter of less than 250 mu m. Finally, we fabricate 6-mode 19-core fiber with a 246 mu m cladding diameter and realize a relative core multiplicity factor of more than 60 with a low loss and a DMD of less than 0.24 dB/km and 0.33 ns/km, respectively.
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