Title :
Duty-ratio control of nonlinear phase noise in dispersion-managed WDM transmissions using RZ-DPSK modulation at 10 Gb/s
Author :
Tonello, A. ; Wabnitz, S. ; Boyraz, O.
Author_Institution :
Lab. de Phys., Bourgogne Univ., Dijon
Abstract :
The authors compare analytical and numerical estimates, showing that the nonlinear phase noise of short optical pulses associated with the coupling between amplified spontaneous emission noise and fiber nonlinearity may be controlled by adjusting the duty cycle of the return-to-zero (RZ) signal modulation format. The impact of this effect in the optimization of the performance of 10-Gb/s dispersion-managed wavelength division multiplexed (WDM) systems using RZ-differential phase-shift keying (DPSK) modulation is discussed. By extensive numerical simulations, it is shown that the transmission quality of ultradense WDM systems using the RZ-DPSK modulation format may be significantly enhanced by optimizing the duty cycle of the RZ pulses
Keywords :
differential phase shift keying; nonlinear optics; optical fibre communication; optical fibre dispersion; optical modulation; optical noise; phase noise; superradiance; wavelength division multiplexing; 10 Gbit/s; RZ-DPSK modulation; WDM; amplified spontaneous emission noise; dispersion-managed transmissions; duty cycle; duty-ratio control; fiber nonlinearity; modulation format; nonlinear phase noise; return-to-zero differential phase-shift keying; return-to-zero signal modulation; short optical pulses; wavelength division multiplexed systems; Optical control; Optical coupling; Optical noise; Optical pulses; Phase estimation; Phase modulation; Phase noise; Signal analysis; Spontaneous emission; Wavelength division multiplexing; Nonlinear optics; optical fiber communication; phase modulation;
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2006.882238
