Well, yeah, "space communication" in the title really means "SPACE"-- as in not on Earth. There's interesting considerations in space laser communications that

Well, yeah, "space communication" in the title really means "SPACE"-- as in not on Earth. There's interesting considerations in space laser communications that you don't see in fiber such as "point-ahead" optics to account for the fact that the speed of light is finite and the target is moving. This can be thought of as the optical equivalent of peeing into a moving bucket. It's a fascinating review article.