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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 29,
  • Issue 14,
  • pp. 2138-2145
  • (2011)

Direct-Detection Optical OFDM Transmission System With Pre-Emphasis Technique

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Abstract

We investigated the effect of subcarriers-to-subcarriers mixing interference and frequency fading in direct-detection (DD) optical orthogonal frequency-division multiplexing (OFDM) system. We also proposed and experimentally demonstrated a novel DD OFDM transmission scheme with pre-emphasis technique. By pre-emphasizing the power of the OFDM subcarriers at the high frequency, the received sensitivity at our experiment was improved about 2 dB at a bit error rate of $1 x 10<sup>-4</sup> after 100-km SMF-28 transmission compared to the regular one without this technique.

© 2011 IEEE

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