Cost-effective 10-Gb/s optical duobinary transmission systems using a nonbuffered X-cut LiNbO3 Mach-Zehnder modulator

Hanlim Lee, Gyuwoong Lee, Sung Kee Kim, Heewon Cheung, Sangho Kim, Hoon Kim, Seongtaek Hwang, Yunje Oh, Jichai Jeong, Changsup Shim

Research output: Contribution to journalArticlepeer-review

5 Citations (Scopus)


We demonstrate a cost-effective method to implement a 10-Gb/s optical duobinary transmitter using a simple nonbuffered x-cut LiNbO3 Mach-Zehnder (MZ) modulator. The bandwidth of the modulator used in our experimental demonstration is 4 GHz. The duobinary signal generated from the nonbuffered MZ modulator exhibits a similar performance to the one using a 9-GHz bandwidth buffered MZ modulator, in terms of dispersion and self-phase modulation tolerance. Thus, the use of cost-effective nonbuffered x-cut MZ modulators will substantially relax the cost issues of duobinary transmitters, by offsetting the cost of the precoder and the encoder which are not needed in conventional ON-OFF keying transmitters.

Original languageEnglish
Pages (from-to)1188-1190
Number of pages3
JournalIEEE Photonics Technology Letters
Issue number4
Publication statusPublished - 2004 Apr


  • 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
  • Electrical and Electronic Engineering


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