Hello folks , A newbie here so don't expect me to have read too many post and threads and such . So if this topic have been discussed , feel free to let me know . I do want to post a interesting question that takes the scope of VHF , UHF and beyond to the beyond limit . I'm curious about using light waves instead of RF waves . What efforts , projects and scientific papers have been created to explore using for example...LASER beams to communicate ? I can envision having a short focal length telescope spinning on top of my tower looking for a beam back at me . The same telescope could so easily be equipped with a simple LASER pointer at he eye piece ready to broadcast back to the other station . The hardware upstairs does not need to be too complicated , possibly be more affordable . Read on . I think it would be very similar to Yagi's , longer the boom and element count the narrower the beam pattern . So it's the same age old paradigm , gain versus beam width . That is also very true for light buckets , oops I meant telescopes . Short focal wave lengths telescopes have wider views but less resolving power . And the opposite is true , longer and more narrow view . It seems very possible to easily erect a " light bucket " contraption either a refactor , reflector or the very wide view ...the parabolic dish . If you can see the blinking red light on top of those commercial broadcasting towers , so would your light sensing device . Better yet...imagine bouncing your LASER beam off the moon ! There are mirrors on the moon just for that purpose ! Seriously folks...can you imagine making a EME voice QSO to and from the moon using 5mw at 650 nm !!! That would be outstanding . Consumer grade telescopes today comes with tracking hardware for following celestial objects , including the moon . High quality cameras are now common for the amateur astronomer but not sure if they are fast enough to catch a modulated LASER beam . What would it take for power ? I really don't know . I assume we are still required to keep visible LASER power to 5mw ? All this sounds really interesting and surely will challenge those who tries this mode out and see what performance , reliability and range they can achieve . I think with good results and favorable to the masses , this could be the beginning of high resolution voice , video , data ect ...bounced from the moon or across town .