Title :
RZ versus NRZ in nonlinear WDM systems
Author :
Forghieri, Fabrizio ; Prucnal, P.R. ; Tkach, R.W. ; Chraplyvy, A.R.
Author_Institution :
Crawford Hill Lab., AT&T Bell Labs., Holmdel, NJ, USA
fDate :
7/1/1997 12:00:00 AM
Abstract :
The issue of what is the best duty cycle in an intensity-modulated direct-detection optical system keeps resurfacing. Here, this issue is addressed from a transmission point of view for a wavelength-division-multiplexed (WDM) system. It is shown that nonreturn-to-zero (NRZ) is more robust to optical fiber transmission impairments for both already deployed systems and new systems in which the dispersion map is a design parameter.
Keywords :
optical fibre communication; optical fibre dispersion; optical modulation; optical solitons; wavelength division multiplexing; NRZ; RZ; best duty cycle; design parameter; dispersion map; intensity-modulated direct-detection optical system; nonlinear WDM systems; nonreturn-to-zero; optical fiber transmission impairments robustness; return-to-zero; transmission; wavelength-division-multiplexed; Chromatic dispersion; Laboratories; Optical fiber communication; Optical fiber dispersion; Optical pulses; Optical receivers; Optical signal processing; Pulse modulation; Solitons; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
