Title :
An optical multicast overlay scheme using optical sub-carriers for WDM passive optical networks
Author :
Qiu, Yang ; Chan, Chun-Kit
Author_Institution :
Dept. of Inf. Eng., Chinese Univ. of Hong Kong, Shatin, China
Abstract :
We propose to make use of optical sub-carriers to realize optical multicast overlay on a WDM passive optical network. By employing optical carrier suppression technique at each downstream optical transmitter at the OLT, two coherent optical sub-carriers are generated to carry the 10-Gb/s downstream unicast DPSK signal and the 10-Gb/s downstream multicast ASK signal, separately without any additional light sources. At the ONU, the 10-Gb/s upstream data is superimposed on the received downstream unicast DPSK signal, to form the upstream ASK signal. System characterization is performed to optimize the performance. In addition, we further demonstrate simultaneous optical overlay of two streams of multicast data in the network.
Keywords :
amplitude shift keying; differential phase shift keying; multicast communication; optical fibre networks; optical transmitters; wavelength division multiplexing; WDM passive optical networks; bit rate 10 Gbit/s; downstream optical transmitter; multicast ASK signal; optical carrier suppression; optical line terminal; optical multicast overlay; optical network unit; optical subcarrier; unicast DPSK signal; Amplitude shift keying; Differential quadrature phase shift keying; Light sources; Optical fiber networks; Optical transmitters; Passive optical networks; Signal generators; Unicast; WDM networks; Wavelength division multiplexing; wavelength-division-multiplexing, passive optical network, orthogonal modulation, differential phase shift keying, amplitude shift keying, multicast, optical carrier suppression, sub-carrier modulation;
Journal_Title :
Selected Areas in Communications, IEEE Journal on
DOI :
10.1109/JSAC.2010.100807
