FBG-assisted ICI reduction for AO-OFDM demultiplexed signal

Mumtaz Ali, Xu Wang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review


In an all-optical orthogonal frequency division multiplexing (AO-OFDM) system, the demultiplexed subcarriers from an optical discrete fourier transform circuit are needed to be sampled by optical gates in the intercarrier interference (ICI)-free narrow interval. In this article, we present a theoretical investigation of fiber Bragg grating (FBG) assisted ICI reduction in an AO-OFDM system in place of an optical sampling gate (SG). The optimum durations of SG and FBG are analyzed for different symbol rise times (trise) and the analysis is extended to chromatic dispersion (CD) effects. The proposed FBG device provides tolerance to dispersion, which causes shifting of narrowed ICI-free region. The FBG achieves BER < 10-3 for transmission of 45 km without cyclic prefix, and synchronization with shifted ICI-free region is not needed.

Original languageEnglish
Pages (from-to)2320-2324
Number of pages5
JournalMicrowave and Optical Technology Letters
Issue number10
Publication statusPublished - 2014


  • chromatic dispersion
  • FBG
  • ICI
  • optical communications

ASJC Scopus subject areas

  • Condensed Matter Physics
  • Atomic and Molecular Physics, and Optics
  • Electronic, Optical and Magnetic Materials
  • Electrical and Electronic Engineering


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