The following thesis is presenting a technology of the free space optics. In last decade the world has witnessed a huge increase of data traffic transferred in telecommunication networks. Free space optics is a solution in areas where is impossible to put optical fiber or the costs is too high. For the purpose of introductory part of this thesis is to describe features and areas of free space optics. FSO units are shown and described with their transmitters and receivers and a list of factors, which have a direct influence on a data transfer. Weather influences are in particular emphasized, because they mostly impact in the quality of data transfer. Next chapter describes infrared spectrum, in which free space optics operate, and then main parts of these system. These are laser diode for transmitting and photodiode for receiving signals.
Practical experiment is covered in the last part of the thesis in which I wanted to present FSO communication. Laser diode transmits amplitude modulated sound to the receiving photodiode.
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