Improvement of power margin in 10-Gb/s SOA-boosted transmission systems using phase-modulated duobinary modulation formats

Yonggyoo Kim, Yongnoh Lee, Jaehoon Lee, Sungki Kim, Jichai Jeong

Research output: Contribution to journalArticlepeer-review

4 Citations (Scopus)

Abstract

We theoretically investigate the performance of 10-Gb/s semiconductor optical amplifier (SOA)-boosted transmission systems using the nonreturn-to-zero (NRZ), conventional duobinary, and phase-modulated (PM)-duobinary modulation formats. NRZ and conventional duobinary modulation formats are based on the intensity modulation. When the NRZ and conventional duobinary modulation formats are used, the nonlinear characteristics of SOA severely distort the signals. On the other hand, the PM-duobinary modulation format is based on differential binary phase-shift-keying modulation. When the PM-duobinary modulation format is employed, the nonlinear characteristics of SOA scarcely affect the signals which maintain a constant intensity in SOAs. Using the PM-duobinary modulation format, we can significantly improve the power margin in SOA-boosted transmission systems.

Original languageEnglish
Pages (from-to)2377-2379
Number of pages3
JournalIEEE Photonics Technology Letters
Volume16
Issue number10
DOIs
Publication statusPublished - 2004 Oct

ASJC Scopus subject areas

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

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