A cost effective FSO communication link using 808 nm laser and its performance analysis in simulated temperature conditions

Using 808 nm NIR Laser, a cost effective FSO communication channel has been established. Scintillation, the phenomenon, which is produced by the heating effect, affects the FSO communication channel severely. As a result, the communication channel performance has degraded. For investigation the scintillation effect upon the 808 nm FSO link, a 40 ft. artificial chamber has been made for scintillation simulation in the laboratory. From very high to low scintillation effect has been created in the artificial chamber, and a 10 MHz On–Off Keying modulated optical signal has been taken for testing. The optical power attenuation, the real time eye pattern has been measured for different types of scintillation effect. Applying the aperture averaging scheme, a significant amount of optical power attenuation has been reduced, as a result, the value of signal to noise ratio (SNR) has been increased and the channel performance has been improved significantly.