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Optica Publishing Group
  • Journal of Lightwave Technology
  • Vol. 27,
  • Issue 17,
  • pp. 3912-3918
  • (2009)

Driving Requirements for Wavelength Shifting in Colorless ONU With Dual-Arm Modulator

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Abstract

Dual-arm modulator configurations to perform wavelength shifting at the optical network units (ONUs) for the mitigation of Rayleigh backscattering impairment in bidirectional centralized-light passive optical networks (PONs) are proposed, with different solutions compared. A 7 dB of sensitivity improvement due to the reduction in the Rayleigh scattering crosstalk between up- and down-stream signals is achieved with a suboptimal solution based on a conventional Mach–Zenhder modulator.

© 2009 IEEE

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