Ultra-short duration pulse lasers

[GURPS Fox]

Originally Posted by whswhs

I don't see why. If you deliver a GJ over one second, you have a power of 1 GW while it's on. If you deliver it over one millisecond, you have a (much briefer) power of 1 TW. But the total energy delivered is still 1 GJ. It just arrives more all at once.

From what I can tell, that isn't exactly the case. Especially as you get to ultra-short durations.