Energy saving via dynamic wavelength sharing in WDM-PON

Significant energy saving is achievable by adapting the number of operating wavelengths to the varying traffic in a reconfigurable WDM-PON deploying passive splitter at the remote node. When dynamic wavelength sharing by ONUs is intelligently planned, the traffic disruption incurred by reconfiguration can be kept at a minimum. Moreover, ONUs need only limited wavelength tunability, in contrast to full wavelength tunability, to save significant energy via wavelength sharing.