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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 24,
  • Issue 2,
  • pp. 734-
  • (2006)

Comparison Between NRZ and Duobinary Modulation at 43 Gb/s for MLSI-Based and DCF-Based Transmission Systems

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Abstract

In this paper, the performance of midlink spectral inversion (MLSI) is compared with the performance of"conventional"dispersion compensation fiber (DCF)-based transmission for two data formats: 43-Gb/s ON-OFF keying nonreturn-to-zero (OOK-NRZ) and 43-Gb/s duobinary. In the MLSI-based system, a polarization-diverse subsystem was used for spectral inversion employing magnesium-oxide-doped periodically poled lithium niobate (PPLN) waveguide technology. The transmission link consists of 8 × 100 km standard single-mode fiber (SSMF) using erbium-doped fiber amplifiers (EDFAs) for amplification. Compared to the DCF-based system, it is seen that the MLSI-based configuration enhances the dispersion tolerance for both the NRZ and the duobinary modulation formats. It is concluded that the combination of the MLSI and the duobinary modulation format yields a highly dispersion-tolerant stable 43-Gb/s transmission system.

© 2006 IEEE

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