Optimized filtering for AMI-RZ and DCS-RZ SSB signals in 40-Gb/s/ch-based UDWDM systems

Author

Charrua, Pedro M A ; Cartaxo, Adolfo V T

Author_Institution

Opt. Commun. Group, Inst. de Telecomunicacoes, Lisboa, Portugal

Volume

17

Issue

1

fYear

2005

Firstpage

223

Lastpage

225

Abstract

Optical sideband suppression filtering is proposed for alternate-mark-inversion return-to-zero (AMI-RZ) and duobinary-carrier-suppressed-RZ (DCS-RZ) coding formats as a solution for improving the performance of 40-Gb/s/channel with 50-GHz channel spacing wavelength-division-multiplexing systems. A suppressed sideband power ratio exceeding 20 dB is achieved by both formats; hence, these filtered signals are single-sideband (SSB) signals. Simulation results reveal that AMI-RZ-SSB and DCS-RZ-SSB signals exhibit similar nonlinear transmission performance and better dispersion-compensation-ratio tolerance relative to the duobinary signal. After 8×80 km of low-cost transmission spans and considering easy configurations at the transmitter and receiver, a Q factor around six remains attainable by both SSB signals.

Keywords

Q-factor; channel spacing; compensation; encoding; optical fibre communication; optical fibre dispersion; optical filters; optical modulation; optical receivers; optical transmitters; wavelength division multiplexing; 40 Gbit/s; 50 GHz; 80 km; AMI-RZ signal filtering; DCS-RZ SSB signal filtering; Q factor; UDWDM system; alternate-mark inversion return-to-zero coding format; channel spacing; dispersion-compensation-ratio tolerance; duobinary-carrier-suppressed-RZ coding format; optical sideband suppression filtering; receiver; single-sideband signals; transmitter; wavelength division multiplexing; Amplitude modulation; Fiber nonlinear optics; Filtering; Nonlinear optics; Optical attenuators; Optical fiber filters; Optical filters; Optical modulation; Optical receivers; Optical transmitters; Alternate-mark inversion (AMI); dispersion-compensation ratio (DCR); duobinary-carrier suppressed (DCS); long-haul transmission; single sideband (SSB); ultradense wavelength-division multiplexing (UDWDM);

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2004.838282

Filename

1372637