.  Hill Country Research Innovations in Telecommunication and Automation     LASER Link

This communicator uses visible light (infrared optional) to transmit data, voice or control signals over medium distances.  It uses a 5 mW LASER on the transmitter side and a high power lens in the receiver to focus the beam to the high sensitivity detector element.
 
 

• range to 5 km
• high bandwidth
• no FCC involvement
• easy directional adjustment