Taiji Sakamoto
NTT Access Network Service Systems Laboratories, Japan
Title: Randomly-coupled multi-core fi ber for long-haul optical MIMO transmission system
Biography
Biography: Taiji Sakamoto
Abstract
The capacity of conventional single-mode fi ber (SMF) that is widely used in the existing optical communication network is expected to be limited to around 100 Tbit/s owing to the non-linear eff ect of the optical fi ber. Space division multiplexing technologies using multi-core fi ber (MCF) or few-mode fi ber have been investigated for overcoming the capacity crunch of conventional SMF. MCF has multiple cores within a cladding and multiple signals can be transmitted in parallel by using multiple cores. One important parameter for MCF is spatial density, namely the number of spatial channels per unit area, since the cladding diameter of the fiber is limited to a certain value in terms of mechanical reliability. Recently, coupled MCF which has a low core pitch value between the cores compared to the non-coupled MCF has been investigated with the aim of improving the spatial density. In this paper, we review recent progress on coupled multi-core fi ber (MCF) technologies and advantages of using this type of MCF for optical MIMO transmission system. Finally we report our recent results for high spatial density randomly-coupled MCF with low modal dispersion characteristic, which is benefi cial for realizing long-haul optical MIMO transmission.