Optical beat noise reduction in WDM-SCM access networks using modulated optical pulse train

Hyun Do Jung, Yong Yuk Won, Sang Kook Han

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

We proposed a new method to suppress the optical beat interference (OBI) in wavelength-division-multiplexing/subcarrier-multiple-access network. The proposed scheme uses the modulated optical pulse train that has broad bandwidth in frequency domain. Since the OBI noise is inversely proportional to the optical bandwidth of beating optical signals, the generated OBI noise by beating of optical pulse train signals from several optical network units (ONUs) spreads over wide frequency range. In addition, the chance of optical beating is low because optical pulse trains from different ONU have different pulse timing. We have demonstrated the proposed idea experimentally. In beating experiment, the carrier-to-noise ratio was obtained over 30 dBc regardless of optical beating. In addition, 6-Ms/s 16 quadrature amplitude modulator data at 0.7 GHz was successfully transmitted up to 20 km with an average error-vector-magnitude of 4.5% in presence of optical beating.

Original languageEnglish
Pages (from-to)2215-2217
Number of pages3
JournalIEEE Photonics Technology Letters
Volume17
Issue number10
DOIs
Publication statusPublished - 2005 Oct 1

Fingerprint

Noise abatement
noise reduction
Wavelength division multiplexing
Light interference
Laser pulses
synchronism
Fiber optic networks
pulses
interference
carrier to noise ratios
bandwidth
Bandwidth
multiple access
wavelength division multiplexing
quadratures
Modulators
optical communication
modulators
frequency ranges
time measurement

All Science Journal Classification (ASJC) codes

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

Cite this

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Optical beat noise reduction in WDM-SCM access networks using modulated optical pulse train. / Jung, Hyun Do; Won, Yong Yuk; Han, Sang Kook.

In: IEEE Photonics Technology Letters, Vol. 17, No. 10, 01.10.2005, p. 2215-2217.

Research output: Contribution to journalArticle

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