Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/19101
Title: Long-haul quasi-single-mode transmissions using few-mode fiber in presence of multi-path interference
Authors: Sui, Q
Zhang, HY
Downie, JD
Wood, WA
Hurley, J
Mishra, S
Lau, APT
Lu, C 
Tam, HY 
Wai, PKA 
Issue Date: 2015
Publisher: Optical Society of America
Source: Optics express, 2015, v. 23, no. 3, p. 3156-3169 How to cite?
Journal: Optics express 
Abstract: We study long-haul Quasi-Single-mode (QSM) systems in which signals are transmitted in the fundamental modes of a few-mode fiber (FMF) while keeping other system components such as amplifiers and receivers are kept single-moded. The large-effective-area nature of the FMF fundamental modes improves system nonlinear tolerance in the expense of mode coupling along FMF transmissions which induces multi-path interference (MPI) and needs to be compensated. We analytically investigate 6-spatial-polarization mode QSM transmission systems in presence of MPI and show that in the weak coupling regime, the QSM channel is a Gaussian random process in frequency. MPI compensation filters are derived and performance penalties due to MPI and signal loss from higher-order modes are characterized. We also experimentally demonstrate 256 Gb/s polarization multiplexed (PM)-16-QAM QSM transmissions over a record distance of 2600 km with 100-km span using decision directed least mean square (DD-LMS) algorithm for MPI compensation.
URI: http://hdl.handle.net/10397/19101
EISSN: 1094-4087
DOI: 10.1364/OE.23.003156
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