FSO systems are becoming more and more used taking under consideration the ease of installation and
exploitation under the conditions of the supply of a major fraction of optical fiber bandwidth at reasonable cost.
Choosing elements for manufacturing FSO transceivers must keep into account their destination. FSO transceivers can
be made using LED or LASER devices at the transmission side, the reception side could be equipped with PIN or APD
diodes. This paper makes an analysis of the behavior of semiconductor LASER and LED sources, as well as
semiconductor devices PIN and APD for reception side, in various attenuation scenarios, with the aim of achieving an
optimization of FSO transceiver, corresponding to different geographical areas, taking into account the specific area and
attenuation induced by atmospheric factors, in order to obtain an optimal functioning/price ratio.
In this paper it is calculated the bit error rate versus transmission distance for various combinations of sources/receivers,
using the Matlab and Optiwave modeling environment, for point to point optical system communication.