IEEE Photonics Journal (Jan 2015)

RSOA Intensity Modulator Frequency Chirp-Enhanced Optical OFDM PON Performance

  • B. Y. Cao,
  • M. L. Deng,
  • Q. W. Zhang,
  • R. P. Giddings,
  • M. Wang,
  • J. M. Tang

DOI
https://doi.org/10.1109/JPHOT.2015.2439261
Journal volume & issue
Vol. 7, no. 3
pp. 1 – 11

Abstract

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A reflective semiconductor optical amplifier intensity modulator (RSOA-IM) frequency chirp considerably increases the system frequency response of an intensity-modulation and direct-detection (IMDD) PON system over the passband signal spectral region. Adaptive bit and power loading of optical OFDM (OOFDM) enables full use of the RSOA-IM frequency chirp-enhanced passband system frequency response characteristics. As a direct result, without requiring extra electrical and optical equalization schemes, an RSOA-IM with a 3-dB small-signal modulation bandwidth as low as 1 GHz can support 40 Gb/s OOFDM signal transmissions over 25 km SSMF IMDD PON systems free from optical amplification and chromatic dispersion compensation. This paper suggests that significantly relaxed requirements on both RSOA-IM's 3-dB small-signal modulation bandwidth and frequency chirp are feasible for achieving desired OOFDM transmission performances for next-generation PONs.

Keywords