RZ versus NRZ modulation format for dispersion compensated SMF-based 10-Gb/s transmission with more than 100-km amplifier spacing

C. Caspar, H. M. Foisel, A. Gladisch, N. Hanik, F. Küppers, R. Ludwig, A. Mattheus, W. Pieper, B. Strebel, H. G. Weber

Research output: Contribution to journalArticlepeer-review

39 Citations (Scopus)

Abstract

We compared numerically and experimentally the transmission behavior of return-to-zero (RZ) and nonreturn-to-zero (NRZ) modulated signals. 10 Gb/s were transmitted over 2040-km standard single-mode fiber using an alternating dispersion compensation scheme in a recirculating loop with 102 km amplifier spacing. Receiver sensitivities of -33 dBm (NRZ) and -35 dBm (RZ) could be achieved. RZ allows for a simple linear dispersion compensation whereas NRZ suffers from nonlinear signal distortion. NRZ requires under-compensation of the linear chromatic dispersion dependent on signal power and transmission length. Therefore, NRZ makes network design more difficult.

Original languageEnglish
Pages (from-to)481-483
Number of pages3
JournalIEEE Photonics Technology Letters
Volume11
Issue number4
DOIs
Publication statusPublished - Apr 1999
Externally publishedYes

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