Link aggregation over fiber -- possible?

I'm investigating rolling out some fiber runs in our building to replace bad copper through noisy floors. This is a silly question, but: can I use link aggregation (PAgP or LACP or whichever) between fiber devices in the same way that I can do it between copper devices?

I'd be using the 6-port SC modules in Catalyst 4000s, connecting to Linksys or D-Link switches.

Thanks!

Chris