This is relevant. http://arxiv.org/pdf/0710.0890v2 http://arxiv.org/pdf/0710.0890v2 The gist of the story is: Use a large telescope to not only increase your c

This is relevant. http://arxiv.org/pdf/0710.0890v2 http://arxiv.org/pdf/0710.0890v2 The gist of the story is: Use a large telescope to not only increase your collecting area, but focus your beam onto that surface: turn that measly 1 milliradian divergence laser into a 1 microradian divergence laser.