Performance analysis of single-MZM APRZ transmitters

Author

Forzati, Marco ; Berntson, Anders ; Mårtensson, Jonas ; Davies, Robert J.

Author_Institution

Opt. Syst. & Networks Res. Lab., Acreo Kista, Sweden

Volume

24

Issue

5

fYear

2006

fDate

5/1/2006 12:00:00 AM

Firstpage

2006

Lastpage

2014

Abstract

In this paper, an efficient single Mach-Zender modulator (MZM) implementation of alternate-phase return to zero (APRZ), which combines carrier-suppressed return to zero (CSRZ)´s ease of implementation with APRZ´s nonlinear tolerance, is analyzed. In particular, the first numerical study of 67%-duty-cycle single-MZM APRZ over a 40-Gb/s 5 × 100-km link, in terms of nonlinear, dispersion, and filtering tolerance, comparing it with 33% RZ, 33% APRZ, and standard 67% CSRZ, is presented. The results show that APRZ with phase shift close to π/2 is the optimum choice, independent of specific transmitter implementation. A new mechanism is also discovered, based on the interference of ghost pulses with the original pulse train, which improves the nonlinear tolerance of CSRZ in a 40-Gb/s transmission.

Keywords

filtering theory; nonlinear optics; optical fibre communication; optical fibre dispersion; optical modulation; optical transmitters; 100 km; 40 Gbit/s; 500 km; Mach-Zender modulator; alternate-phase return to zero; carrier-suppressed return to zero; dispersion tolerance; filtering tolerance; ghost pulse interference; nonlinear tolerance; single-MZM APRZ transmitters; Filtering; Interference; Nonlinear optics; Optical pulse generation; Optical pulses; Optical transmitters; Performance analysis; Phase modulation; Pulse modulation; Signal generators; Alternate-phase return to zero (APRZ); fiber-optics communications; fibers; modulation formats; nonlinear optics;

fLanguage

English

Journal_Title

Lightwave Technology, Journal of

Publisher

ieee

ISSN

0733-8724

Type

jour

DOI

10.1109/JLT.2006.871024

Filename

1632237