Design of 125-μm cladding diameter multicore fibers with high core multiplexing factor for wideband optical transmission

Jiang, Shoulin, Ma, Lin, Núñez-Velázquez, Martin, He, Zuyuan and Sahu, Jayanta Kumar (2019) Design of 125-μm cladding diameter multicore fibers with high core multiplexing factor for wideband optical transmission. Optical Fiber Technology, 50, 55-61. (doi:10.1016/j.yofte.2019.02.015).

Abstract

We propose improved design of heterogeneous trench-assisted multicore fibers (MCFs) for wideband space division multiplexing (SDM) optical transmission. By adopting different parameters for heterogeneous cores, the trade-off among the effective area (A_eff ), cut-off wavelength (λ_cc ), and crosstalk (XT) was balanced. Different optimization approaches for long-haul and short-reach transmission applications have been adopted. A 125-μm cladding diameter 6-core fiber with A_eff = 90 μm² , λ_cc = 1300 nm and XT < −30 dB/100 km at 1550-nm wavelength was designed for long-haul transmission. The designed MCF has a relative core multiplexing factor (RCMF) of 6.75, which is the highest value among the reported uncoupled MCFs with compatible bandwidth. Another 125-μm cladding diameter 8-core fiber with an A_eff = 80 μm² , λ_cc = 1300 nm, and XT < −40 dB/km at 1550-nm wavelength was designed for short-reach application and a RCMF of 8.00 was achieved. The XT in both fibers are bending-insensitive due to the small critical bending radius (R_pk ) of 7 cm for 6-core fiber with an A_eff = 90 μm² and 5 cm for 8-core fiber with A_eff = 80 μm² , respectively. The designed fibers are promising for high-density wideband SDM transmission.

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Contributors

Author: Martin Núñez-Velázquez

Author: Jayanta Kumar Sahu

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