Impact of band rejection in multichannel broadband subcarrier multiplexing

Fernando A. Gutiérrez, Philip Perry, Frank Smyth, Andrew D. Ellis, Liam P. Barry

Research output: Contribution to journalArticle

9 Citations (Scopus)

Abstract

This paper explores experimentally the impairments in performance that are generated when multiple single-sideband (SSB) subcarrier multiplexing (SCM) signals are closely allocated in frequency to establish a spectrally efficient wavelength division multiplexing (WDM) link. The performance of cost-effective SSB WDM/ SCM implementations, without optical filters in the transmitter, presents a strong dependency on the imperfect sideband suppression ratio that can be directly achieved with the electro-optical modulator. A direct detected broadband multichannel SCM link composed of a state-of-the-art optical IQ modulator and five quadrature phase-shift keyed (QPSK) subcarriers per optical channel is presented, showing that a suppression ratio of 20 dB obtained directly with the modulator produced a penalty of 2 dB in overall performance, due to interference between adjacent optical channels.

Original languageEnglish
Article number7090233
Pages (from-to)248-252
Number of pages5
JournalJOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING
Volume7
Issue number4
DOIs
Publication statusPublished - 1 Apr 2015

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Keywords

  • Optical IQ modulator
  • Sideband suppression ratio (SSR)
  • Subcarrier multiplexing (SCM)
  • Wavelength division multiplexing (WDM)

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