Improvement of SPM Tolerance for Phase-Modulated Duobinary Transmissions Using Phase Modulator with Postfiltering Technique

Yonggyoo Kim, Hodoek Jang, Jae Hoon Lee, Inkyu Lee, Moonil Kim, Jichai Jeong

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

We theoretically investigate self-phase modulation (SPM) tolerance of a new duobinary signals employed a phase modulator and optical filter, referred to as phase-modulated (PM) duobinary signals. For the conventional duobinary transmission (DBT) with electrical low-pass filters, fiber input power is strongly limited due to SPM. However, our results suggest that SPM tolerance can be improved while maintaining high dispersion tolerance using PM-DBT, since the signals with a constant power are transmitted over fibers. Adjusting the phase difference between mark and space levels of phase modulators, we can further improve SPM tolerance, compared with the conventional DBT.

Original languageEnglish
Pages (from-to)1785-1787
Number of pages3
JournalIEEE Photonics Technology Letters
Volume15
Issue number12
DOIs
Publication statusPublished - 2003 Dec 1

Fingerprint

Self phase modulation
phase modulation
Modulators
modulators
fibers
Optical filters
low pass filters
Fibers
Low pass filters
optical filters
adjusting
filters

Keywords

  • Duobinary
  • Modulation format
  • Optical communication
  • Simulation

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Atomic and Molecular Physics, and Optics
  • Physics and Astronomy (miscellaneous)

Cite this

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abstract = "We theoretically investigate self-phase modulation (SPM) tolerance of a new duobinary signals employed a phase modulator and optical filter, referred to as phase-modulated (PM) duobinary signals. For the conventional duobinary transmission (DBT) with electrical low-pass filters, fiber input power is strongly limited due to SPM. However, our results suggest that SPM tolerance can be improved while maintaining high dispersion tolerance using PM-DBT, since the signals with a constant power are transmitted over fibers. Adjusting the phase difference between mark and space levels of phase modulators, we can further improve SPM tolerance, compared with the conventional DBT.",
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AU - Lee, Inkyu

AU - Kim, Moonil

AU - Jeong, Jichai

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AB - We theoretically investigate self-phase modulation (SPM) tolerance of a new duobinary signals employed a phase modulator and optical filter, referred to as phase-modulated (PM) duobinary signals. For the conventional duobinary transmission (DBT) with electrical low-pass filters, fiber input power is strongly limited due to SPM. However, our results suggest that SPM tolerance can be improved while maintaining high dispersion tolerance using PM-DBT, since the signals with a constant power are transmitted over fibers. Adjusting the phase difference between mark and space levels of phase modulators, we can further improve SPM tolerance, compared with the conventional DBT.

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