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

Y. Y. Won, H. C. Kwon, S. K. 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

All Science Journal Classification (ASJC) codes

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

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