Channelmania! – future proof your DWDM network topology while keeping it flexible for 1.6T (denog17)

Chaos Computer Club - recent audio-only feed

Past approaches for maximizing the data capacity per fiber pair went for running more and more DWDM channels with grid spacings as small as possible. This meant that grid spacings shrank from 200GHz to 100Ghz and then 50GHz with some applications even going for 25Ghz. In recent years the bandwidth per channel kept increasing, as complex modulation schemes came into favor over ON-OFF-Keying which has been a staple in fiber optic communication for decades. Those increased per channel bandwidths of 400Gbps, 800Gbps and now pushing into the 1.6Tbps realm demand for lager grids to accommodate the spectrum necessary to operate such “Superchannels”. Especially the fact of coherent detection being “blind” to anything but its own wavelength has enabled interesting topologies that can omit filters altogether. Of course that comes at a cost of reduced flexibility. Learn how you can harvest some of those benefits by moving to 400GHz filters while keeping a lot of your flexibility. Keep your 10Gbps and below legacy signals on the same fiber as your fast stuff and easily reassign your bandwidth without the cost ROADMs. Made by FLEXOPTIX Research - Gert and Thomas. Licensed to the public under http://creativecommons.org/licenses/by/4.0 about this event: https://pretalx.com/denog17/talk/8N7Q3A/