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fiber optic transmitter and reciever booster

I am a hobbist/inventor/sculptor/geek. I am looking for plans or a kit to build a fiber optic booster transmitter and reciever. Or even a unit that can send and recieve data and video signals. The signal must be able to travel a minimum of 300 ft. I am trying to build a submersible rov that I can afford. The other option that I might have is a rf to fiber optic converter. Would anyone be able to help me out?