Performance limits of 10-Gb/s optical duobinary transmissions using reduced bandwidth single-arm Mach-Zehnder modulators considering residual chirp and dc-bias offset

Shinhee Won, Jaehoon Lee, Yonghoon Kim, Seongha Kim, Jichai Jeong

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

We investigate the performance limits and the impact on the system margin of 10-Gb/s duobinary modulations due to reducing the bandwidths of single-arm Mach-Zehnder (MZ) modulators in a 10-Gb/s duobinary transmitter through numerical simulation. In addition to that, the individual and combined effects of dc-bias offset ratio to switching voltage and residual chirp due to the asymmetry of modulators on the system performance have been studied using reduced bandwidth single-arm MZ modulators. Our results suggest that with a single-arm MZ modulator of bandwidth reduced to 5 GHz and a duobinary filter of 2.6-GHz bandwidth, the sensitivity penalty can be maintained within 2 dB over a 200-km span of uncompensated single-mode fiber referred to that at 0 km of ideal duobinary transmitters. In this case, the allowable range of the residual-chirp parameter is to be from -0.1 to +0.1 with dc-bias offset ratio of less than ±2.5%.

Original languageEnglish
Pages (from-to)479-481
Number of pages3
JournalIEEE Photonics Technology Letters
Volume15
Issue number3
DOIs
Publication statusPublished - 2003 Mar

Bibliographical note

Funding Information:
Manuscript received October 1, 2002; revised November 26, 2002. This work was supported in part by the NRL Program and the BK21 Program in South Korea. The authors are with the Department of Radio Engineering, Korea University, Seoul 136-701, Korea. Digital Object Identifier 10.1109/LPT.2002.807950

Keywords

  • Duobinary modulation
  • Modulation format
  • Optical communication
  • Optical transmitter
  • Simulation
  • Single-arm Mach-Zehnder (MZ) modulator
  • System analysis and design

ASJC Scopus subject areas

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

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