Title :
NRZ versus RZ in 10-40-Gb/s dispersion-managed WDM transmission systems
Author :
Hayee, M.I. ; Willner, A.E.
Author_Institution :
Tyco Submarine Syst., Eacontown, NJ, USA
Abstract :
We compare nonreturn-to-zero (NRZ) with return-to-zero (RZ) modulation format for wavelength-division-multiplexed systems operating at data rates up to 40 Gb/s. We find that in 10-40-Gb/s dispersion-managed systems (single-mode fiber alternating with dispersion compensating fiber), NRZ is more adversely affected by nonlinearities, whereas RZ is more affected by dispersion. In this dispersion map, 10- and 20-Gb/s systems operate better using RZ modulation format because nonlinearity dominates. However, 40-Gb/s systems favor the usage of NRZ because dispersion becomes the key limiting factor at 40 Gb/s.
Keywords :
nonlinear optics; optical fibre dispersion; telecommunication network management; wavelength division multiplexing; 10 to 40 Gbit/s; Gb/s dispersion-managed WDM transmission systems; dispersion compensating fiber; dispersion map; key limiting factor; nonlinearities; nonreturn-to-zero modulation format; optical fibre dispersion; return-to-zero modulation format; Fiber nonlinear optics; Optical fiber communication; Optical fiber dispersion; Optical mixing; Optical modulation; Optical signal processing; Optical transmitters; Pulse modulation; Scanning probe microscopy; Wavelength division multiplexing;
Journal_Title :
Photonics Technology Letters, IEEE
