Efficiency power using a new dual diffuser modulation technique in free space optical communication

This paper focus on increase the efficiency power in free space optical communication by using new dual diffuser modulation (DDM) technique. Atmospheric turbulence effect which is considering on scintillation phenomenon is considered in this case study. Phase screen diffuser which will be placed at transmitter create `new' beam wave to propagate through turbulence more efficiently. This technique uses two transmitter and differential mode detection at the receiver. The result shows that at 622Mbps data bit rate the DDM technique can detect more weak signal approximately -15dBm and with assume fix propagation distance at 1km the power received can achieved -26dBm. As the result, DDM technique improved the efficiency power if compare to conventional technique that apply intensity modulation - direct detection of On Off Keying (IM-DD OOK).