Characteristics of homogeneous multi-core fibers for SDM transmission
Artikel i vetenskaplig tidskrift, 2019

We describe optical data transmission systems using homogeneous, single-mode, multi-core fibers (MCFs). We first briefly discuss space-division multiplexing (SDM) fibers, observing that no individual SDM fiber offers overwhelming advantages over bundles of single-mode fiber (SMF) across all transmission regimes. We note that for early adoption of SDM fibers, uncoupled or weakly coupled fibers which are compatible with existing SDM infrastructure have a practical advantage. Yet, to be more attractive than parallel SMF, it is also necessary to demonstrate benefits beyond improved spatial spectral efficiency. It is hoped that the lower spread of propagation delays (skew) between spatial channels in some fibers can be exploited for improved performance and greater efficiency from hardware sharing and joint processing. However, whether these benefits can be practically harnessed and outweigh impairments or effort to mitigate cross talk between spatial channels is not yet clear. Hence, focusing on homogeneous MCFs, we first describe measurements and simulations on the impact of inter-core cross talk in such fibers before reporting experimental investigation into the spatial channel skew variation with a series of the experimental results including a comparison with SMF in varying environmental conditions. Finally, we present some system and transmission experiments using parallel recirculating loops that enable demonstration of both multi-dimensional modulation and joint digital processing techniques across three MCF cores. Both techniques lead to increased transmission reach but highlight the need for further experimental analysis to properly characterize the potential benefits of correlated propagation delays in such fibers.

Författare

Benjamin J. Puttnam

Japan National Institute of Information and Communications Technology

R. S. Luis

Japan National Institute of Information and Communications Technology

G. Rademacher

Japan National Institute of Information and Communications Technology

Arni Alfredsson

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Werner Klaus

Japan National Institute of Information and Communications Technology

J. Sakaguchi

Japan National Institute of Information and Communications Technology

Y. Awaji

Japan National Institute of Information and Communications Technology

Erik Agrell

Chalmers, Elektroteknik, Kommunikations- och antennsystem, Kommunikationssystem

Naoya Wada

Japan National Institute of Information and Communications Technology

APL Photonics

2378-0967 (eISSN)

Vol. 4 2 022804

Ämneskategorier

Atom- och molekylfysik och optik

Annan fysik

Signalbehandling

DOI

10.1063/1.5048537

Mer information

Senast uppdaterat

2019-02-04