Novel architectures for orthogonal wavelength division multiplexed passive optical networks (OWDM-PONs) in a 25-GHz grid

A novel orthogonal wavelength-division-multiplexed passive optical network with 25-GHz channel spacing has been proposed and experimentally demonstrated for the first time. Error-free transmission over 15-km SMF-28 was achieved for both 25-Gb/s downlink and 12.5-Gb/s uplink.