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Linearization and dispersion tolerable technique for remote access unit in uplink RoF system based on gain-saturated RSOA cascaded EAM
Authors:Moon-Ki Hong
Institution:
  • Dept. of Electrical and Electronic Engineering, Yonsei University, Seoul, Republic of Korea
  • Abstract:A novel scheme of a remote access unit which is based on an electroabsorption modulator cascaded by a gain-saturated reflective semiconductor optical amplifier is proposed to improve a transmission performance of uplink signal. The cascaded gain-saturated reflective semiconductor optical amplifier plays a role in enhancing linearity of the electroabsorption modulator as well as suppressing dispersion-induced carrier suppression in the uplink transmission using its nonlinear gain property. In the proposed scheme, carrier-to-interference ratio of transmitted 10-GHz band uplink signal was improved by 10.7 dB and the dispersion-induced carrier suppression of 5.65-GHz RF carrier was greatly mitigated by 33.4 dB through the 75.6-km optical link.
    Keywords:Electroabsorption modulator  Gain-saturated reflective semiconductor  Optical amplifier  Phase modulation  Radio-over-fiber system  Remote access unit
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