Modulation formats suitable for ultrahigh spectral efficient WDM systems

Author

Bosco, G. ; Carena, A. ; Curri, V. ; Gaudino, R. ; Poggiolini, P.

Author_Institution

Dipt. di Elettronica, Politecnico di Torino, Italy

Volume

10

Issue

2

fYear

2004

Firstpage

321

Lastpage

328

Abstract

We analyze the performance of four different modulation formats in ultrahigh spectral efficient wavelength-division multiplexing (WDM) systems. Besides standard nonreturn-to-zero intensity modulation, we analyze duobinary, differential phase-shift keying (DPSK), and carrier-suppressed return-to-zero (CSRZ)-DPSK and, for each of them, optimize several system parameters, such as filtering and dispersion map. First, we optimize transmitter and receiver parameters in back-to-back condition, then we study the performance in a multispan scenario and its dispersion map optimization. Duobinary, DPSK, and CSRZ-DPSK show high suitability for ultrahigh spectral efficient WDM systems and high resilience to dispersion compensation tolerances and fiber nonlinearities. The investigation is based on detailed simulative analyses.

Keywords

differential phase shift keying; intensity modulation; intersymbol interference; optical fibre communication; optical fibre dispersion; optical filters; optical modulation; optical receivers; optical transmitters; wavelength division multiplexing; carrier-suppressed return-to-zero-DPSK; differential phase shift keying; dispersion compensation tolerance; dispersion map; duobinary phase shift keying; fiber nonlinearities; filtering map; modulation formats; nonreturn-to-zero intensity modulation; optical transmission systems; receiver parameters; transmitter parameters; ultrahigh spectral efficient WDM systems; ultrahigh spectral efficient wavelength division multiplexing systems; Crosstalk; Differential quadrature phase shift keying; Filtering; Optical fiber dispersion; Optical filters; Optical modulation; Optical receivers; Optical transmitters; Resilience; Wavelength division multiplexing; DPSK; Differential phase-shift keying; duobinary; optical fiber dispersion; optical modulation; wavelength-division multiplexing;

fLanguage

English

Journal_Title

Selected Topics in Quantum Electronics, IEEE Journal of

Publisher

ieee

ISSN

1077-260X

Type

jour

DOI

10.1109/JSTQE.2004.827830

Filename

1303580