All-optical label swapping with wavelength conversion for WDM-IP networks with subcarrier multiplexed addressing

We report the first demonstration of all-optical label swapping with wavelength conversion and subcarrier multiplexed addressing for WDM-IP, This demonstration utilizes a module which is based on cascaded semiconductor optical amplifier wavelength converters that perform the functions of label removal, label rewriting, payload 2R regeneration and double sideband subcarrier label regeneration. Replacement of double-sideband subcarrier labels on a hop-by-hop basis addresses the problem of dispersion induced fading in a multihop fiber network. A direct detection subcarrier receiver is used to recover the label. Switching over four wavelengths covering 16 mm is demonstrated with noninverting wavelength conversion of 2.5-Gb/s payloads and burst mode recovery of 50-Mb/s labels, BER measurements of better than 10(-9) for the wavelength-converted Payload and rewritten labels at all wavelengths are presented.