Density and Guard Band in Migration Scenarios to Coherent Ultra-Dense WDM

In this paper, 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 Gigabitcapable 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 (32x1.25 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.

Provided by: Institute of Electrical and Electronics Engineers Topic: Mobility Date Added: Oct 2011 Format: PDF

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