I think it depends how you read it. So I tend to work on traditional fibre being 0.7c or around 4.7ms/1000km. So I'm assuming the 30 & 50% numbers are for the remaining 0.3c, so around 0.85c. It's funky stuff, and I remember when Soton first announced it, but production runs were in the cms. They were also doing some interesting multi-holed cores, which I guess wouldn't pass a dope test..
Biting the hand that feeds IT
