University of Hertfordshire

From the same journal

By the same authors

  • E. Giacoumidis
  • Athanasios Tsokanos
  • C. Mouchos
  • G. Zardas
  • C. Alves
  • J. L. Wei
  • J. M. Tang
  • C. Gosset
  • Y. Jaouën
  • I. Tomkos
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Original languageEnglish
Article number6331133
Pages (from-to)724-733
Number of pages10
JournalJournal of Optical Communications and Networking
Publication statusPublished - 2012


A performance comparison between a recently proposed novel technique known as fast orthogonal frequency-division multiplexing (FOFDM) and conventional orthogonal frequency-division multiplexing (OFDM) is undertaken over unamplified, intensity-modulated, and direct-detected directly modulated laser-based optical signals. Key transceiver parameters, such as the maximum achievable transmission capacity and the digital-to-analog/analog-to-digital converter (DAC/ADC) effects are explored thoroughly. It is shown that, similarly to conventional OFDM, the least complex and bandwidth efficient FOFDM can support up to 20 Gb/s over 500 m worst-case multimode fiber (MMF) links having 3 dB effective bandwidths of 200 MHz × km. For compensation of the DAC/ADC roll-off, a power-loading (PL) algorithm is adopted, leading to an FOFDM system improvement of 4 dB. FOFDM and conventional OFDM give similar optimum DAC/ADC parameters over 500 m worst-case MMF, while over 50 km single-mode fiber a maximum deviation of only 1 dB in clipping ratio is observed due to the imperfect chromatic dispersion compensation caused by one-tap equalizers.

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