It's sort of interesting to think about how you would feed this with data.

So if there's a router box that on one side has the optical link that can transfer 1.8 pbit/s out then what's on the other side to get the data into the box? 180k 10gbit ethernet ports? Well, obviously not, so there would be ... 180 10 Tbit/s optical links?

And what would be the processor that could multiplex at that data rate?

If the latest intel 6.0ghz processor coult push out one cache line worth of data for each cycle, that would mean you need (1.8 * 10^15) / (64 * 6 * 10^9 * 8) = 586 of these processors! Could some custom silicon handle this or would you need some optical processing?

Wild stuff.