Comparison of RZ Versus NRZ Pulse Shapes for Optical Duobinary Transmission

Author

Chien, Cheng-Chung ; Lyubomirsky, Ilya

Author_Institution

Univ. of California, Riverside

Volume

25

Issue

10

fYear

2007

Firstpage

2953

Lastpage

2958

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);

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2007.903631

Filename

4346604