Title :
Comparison of RZ Versus NRZ Pulse Shapes for Optical Duobinary Transmission
Author :
Chien, Cheng-Chung ; Lyubomirsky, Ilya
Author_Institution :
Univ. of California, Riverside
Abstract :
This paper presents an experimental study and comparison of return-to-zero (RZ) versus nonreturn-to-zero (NRZ) pulse shapes for optical duobinary systems. Surprisingly, and contrary to the case of on-off keying, we find the NRZ pulse shape to be superior, compared with RZ, for duobinary transmission in all the cases that were studied, including systems that are limited by amplified-spontaneous-emission noise, fiber chromatic dispersion, and self-phase modulation.
Keywords :
optical dispersion; optical fibre communication; optical fibre filters; optical modulation; optical receivers; optical transmitters; self-phase modulation; amplified-spontaneous-emission noise; fiber chromatic dispersion; nonreturn-to-zero pulse shapes; on-off keying; optical duobinary transmission; return-to-zero pulse shapes; self-phase modulationop; Fiber nonlinear optics; Nonlinear optics; Optical modulation; Optical noise; Optical pulse shaping; Optical signal processing; Pulse amplifiers; Pulse modulation; Shape; Stimulated emission; Duobinary modulation; fiber optic communications; optical filtering; pulse shape; self-phase modulation (SPM);
Journal_Title :
Lightwave Technology, Journal of
DOI :
10.1109/JLT.2007.903631
