@flatulent ... yes I agree with you. But do you have some docs, examples, ...?
@truebs ... somehow I don't believe how can 802.11 with its 54Mbps help on this, but can you recommend some specific literature or docs?
@biff44 ... thanks for your tip. I'll try to give your idea some insight. However, this would be relatively high-cost solution.
Direct (current) laser modulation (without any external modulators) would (I guess) work, but to find appropriate laser diode would be a problem.