Reduction of optical beat interference using gain-saturated RSOA in upstream WDM/SCM optical links

Y. Y. Won, H. C. Kwon, Sang Kook Han

Research output: Contribution to journalArticle

15 Citations (Scopus)

Abstract

A new scheme for reducing optical beat interference (OBI) noise in optical network units is proposed for subcarrier multiplexing-based access network applications. The optical spectrum of the transmit lasers is broadened by using a radio frequency (RF) clipping tone with a modulation depth greater than one. This reduces the impact of the OBI noise. The distortions caused by an RF clipping tone are also suppressed by introducing a gain-saturated reflective optical amplifier, which shows the characteristics of high-pass filter. The proposed scheme has been verified by measuring the error vector magnitude of 16QAM signal with 20Mbps. Error-free transmission has been achieved even when the light of OBI-noise-causing lasers is stronger than that of the signal laser by 7dB.

Original languageEnglish
Pages (from-to)61-64
Number of pages4
JournalIET Optoelectronics
Volume1
Issue number2
DOIs
Publication statusPublished - 2007 Sep 11

Fingerprint

Light interference
Optical links
Wavelength division multiplexing
upstream
synchronism
interference
Lasers
radio frequencies
lasers
high pass filters
High pass filters
Light amplifiers
Fiber optic networks
multiplexing
Multiplexing
light amplifiers
optical spectrum
Modulation
modulation

All Science Journal Classification (ASJC) codes

  • Atomic and Molecular Physics, and Optics
  • Electrical and Electronic Engineering

Cite this

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abstract = "A new scheme for reducing optical beat interference (OBI) noise in optical network units is proposed for subcarrier multiplexing-based access network applications. The optical spectrum of the transmit lasers is broadened by using a radio frequency (RF) clipping tone with a modulation depth greater than one. This reduces the impact of the OBI noise. The distortions caused by an RF clipping tone are also suppressed by introducing a gain-saturated reflective optical amplifier, which shows the characteristics of high-pass filter. The proposed scheme has been verified by measuring the error vector magnitude of 16QAM signal with 20Mbps. Error-free transmission has been achieved even when the light of OBI-noise-causing lasers is stronger than that of the signal laser by 7dB.",
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Reduction of optical beat interference using gain-saturated RSOA in upstream WDM/SCM optical links. / Won, Y. Y.; Kwon, H. C.; Han, Sang Kook.

In: IET Optoelectronics, Vol. 1, No. 2, 11.09.2007, p. 61-64.

Research output: Contribution to journalArticle

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