Title :
Density and Guard Band in Migration Scenarios to Coherent Ultra-Dense WDM
Author :
Reis, Jacklyn D. ; Neves, Darlene M. ; Teixeira, António L.
Author_Institution :
Inst. de Telecomun., Univ. de Aveiro, Aveiro, Portugal
Abstract :
In this work the maximum density is numerically investigated giving the compromise of physical impairments and spectral efficiency on coherent ultra-dense wavelength division multiplexing passive optical networks (UDWDM-PON). The required guard band to legacy 1.25-2.5 Gb/s intensity modulation direct detection (IMDD) systems specified closely to Gigabit-capable PON equipments is also analyzed in order to mitigate linear and nonlinear crosstalk. Using 3 GHz frequency grid guaranteed the best performance of the system (32×1.25 Gb/s quadrature phase-shift keying with coherent detection) with respect to the 10% Error Vector Magnitude limit; 12.5 GHz guard band to legacy IMDD system was sufficient to minimize strong linear and nonlinear crosstalk (mostly four-wave mixing) on both systems.
Keywords :
crosstalk; intensity modulation; multiwave mixing; passive optical networks; wavelength division multiplexing; coherent detection; coherent ultra-dense WDM; coherent ultra-dense wavelength division multiplexing passive optical networks; four-wave mixing; gigabit-capable PON equipments; guard band; intensity modulation direct detection systems; migration scenarios; nonlinear crosstalk; physical impairments; quadrature phase-shift keying; spectral efficiency; Optical fibers; Optical transmitters; Passive optical networks; Phase shift keying; Wavelength division multiplexing;
Conference_Titel :
Global Telecommunications Conference (GLOBECOM 2011), 2011 IEEE
Conference_Location :
Houston, TX, USA
Print_ISBN :
978-1-4244-9266-4
Electronic_ISBN :
1930-529X
DOI :
10.1109/GLOCOM.2011.6133558
