Corning's compact, low-dispersion interleavers greatly expand wavelength channel counts in DWDM systems. It is the best solution to upgrade existing 100GHz spacing transport system. Corning's DWDM interleavers feature excellent wide, flat passband and high isolation. Both Mux and Demux functions are supported. These interleavers are athermal and therefore require no temperature control. Its sstable center wavelength accuracy over C or L band 80 channels is suitable for higher bit rate application.