Huge growth in cloud data storage and remote processing is driving a rapid expansion of data centre capacity. Large data centres can house up 100,000 individual servers. These are connected with electronic and single-wavelength optical links.

Adopting a Wavelength Division Multiplexed (WDM) data transfer solution in data centres will increase the data transfer bandwidth, simplify fibre management, and reduce power consumption. Low-cost Wavelength Selective Switches (WSSs) are a key enabler for this WDM solution. The ROADMap universal flexible optical switch reduces the effective cost of an individual WSS by an order of magnitude, helping to drive the development of the next generation of datacentre architecture.