Pattern dependency comparison of four different 40-Gb/s optical duobinary transmitters using low-bandwidth modulators

Hanlim Lee, Hoon Kim, Seongtaek Hwang, Yunje Oh, Jaehoon Lee, Jichai Jeong

Research output: Contribution to journalArticle

1 Citation (Scopus)

Abstract

We investigate the pattern dependency of the 40-Gb/s optical duobinary signals generated by a 10-Gb/s-rated Mach-Zehnder modulator with four different configurations. These configurations correspond to all possible combinations of a 15-GHz-bandwidth low-pass filter and a 0.24-nm bandwidth optical filter used to shape up the duobinary signals. We compare through experiment the back-to-back sensitivities and transmission performances of the duobinary signals for pseudorandom bit sequence lengths of 27-1 and 231-1. The results show that the combination of the 10-Gb/s-rated modulator and the 0.24-nm optical filter exhibits the best performance in terms of both the receiver sensitivity and pattern dependency owing to the good frequency response of the optical filter.

Original languageEnglish
Pages (from-to)2768-2773
Number of pages6
JournalOptics Communications
Volume281
Issue number10
DOIs
Publication statusPublished - 2008 May 15

Keywords

  • Lithium niobate (LiNbO) modulator
  • Optical communication
  • Optical duobinary
  • Optical modulation

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Atomic and Molecular Physics, and Optics
  • Physical and Theoretical Chemistry
  • Electrical and Electronic Engineering

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