II-VI FinisarFinisar Corp. has unveiled a line of coarse wavelength division multiplexing (WDM) modules for metropolitan networks. Products include transceivers in eight wavelengths between 1470 and 1610 nm, optical add/drop muxes and multiplexers/demultiplexers with either four or eight channels. They support protocols such as SONET, Gigabit Ethernet and Fibre Channel over a grid of eight coarse WDM optical wavelengths. 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