[DK Zimmerman]

Actually, despite all the preceding comments, I'm unsure about the effect upon fiber.

I have seen absolutely nothing on it, but light has its wave-particle duality and is part of the same spectrum. I simply would be unwilling to bet on it one way or the other.

It would make for an interesting experiment.

[Vermont Lt]

Fiber is just really, really cool glass. The beauty of it that it has virtually not capacity limits and that it can go a long, long way without the signal being boosted or retransmitted.

The lasers on either end (they turn the light on and off--making 0's and 1's) will be significnatly affected by the EMP.

The fiber itself would be no more affected than the jar that holds the jelly in your fridge.