'VSB Technical University of Ostrava, Faculty of Electrical Engineering and Computer Sciences'
Doi
Abstract
In this paper, we investigate optical network
recommendations GPON and XG-PON with triple-play
services in terms of physical reach, number of subscribers,
transceiver design, modulation format and implementation
cost. Despite trends to increase the bit
rate from 2.5 Gb s1 to 10 Gb s1 and beyond, TDMPONs
cannot cope with bandwidth requirements of future
networks. TDM and WDM techniques can be combined,
resulting in improved scalability. Longer physical
reach can be achieved by deploying active network
elements within the transmission path. We investigate
these options by considering their potential coexistence
at the physical layer. Subsequently, we analyse the upgrade
of optical channels to 100 Gb s1 and 256 Gb s1
by using advanced modulation formats, which combine
polarization division multiplexing with coherent detection
and digital signal processing. We show that PDMQPSK
format is suitable for 100 Gb s1 systems and
PDM-16QAM is more beneficial at 256 Gb s1. Simulations
are performed in the OptSim software environment