Building-to-building over the air transmission of optical data
is a growing area of data communications. The fast growing use of bandwidth mandates
the use of over the air transmission equipment capable of similar performance as
the performance of fiber optic transmission, for distances of 3-10 Km. Transparent
transmission is important to enable seamless growth from low data-rare to Gbps
rates, and then to Dense Wavelength Division Multiplexed (DWDM) transmission of
several wavelengths. The only way to achieve the required performance is with narrow,
directable beams. This patent application discloses a Micro-Electro-Mechanical-Systems
(MEMS) mirror based, over the air, optical data transmission system. A narrow optical
beam is used and a MEMS mirror fine-tunes the aiming of the beam to track building
movement, vibrations etc.