Title :
Coupled Multicore Fiber Design With Low Intercore Differential Mode Delay for High-Density Space Division Multiplexing
Author :
Sakamoto, Taiji ; Mori, Takayoshi ; Wada, Masaki ; Yamamoto, Takashi ; Yamamoto, Fumihiko
Author_Institution :
NTT Access Networks Service Syst. Labs., Tsukuba, Japan
Abstract :
A moderately coupled multicore fiber (MCF) design is proposed with the aim of realizing both low intercore multiple-input multiple-output (MIMO) processing complexity and high-space utilization efficiency. We numerically and experimentally investigated the influence of mode coupling on the intercore differential mode delay (DMD) in homogeneous core MCF, and show a moderately coupled MCF design to avoid increasing the intercore DMD, which enables us to compensate for the intercore crosstalk by MIMO processing with low computational complexity. Finally, we fabricated 125-μm-cladding two LP-mode six-core fiber and experimentally realized the highest normalized channel multiplicity of 18 without a noticeable DMD increase induced by mode coupling.
Keywords :
MIMO communication; communication complexity; optical crosstalk; optical design techniques; optical fibre cladding; optical fibre communication; optical fibre fabrication; space division multiplexing; telecommunication channels; LP-mode six-core fiber; channel multiplicity; computational complexity; coupled multicore fiber design; high-density space division multiplexing; high-space utilization efficiency; homogeneous core multicore fiber; intercore crosstalk; intercore differential mode delay; mode coupling; multiple-input multiple-output processing complexity; Complexity theory; Couplings; Crosstalk; MIMO; Optical fiber cables; Optical fiber networks; Optical fiber polarization; Differential mode delay; Multi-core fiber; differential mode delay; few-mode fiber; multicore fiber; multiple-input multiple-output;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2014.2376526
