All-optical method of generation of Phase Shift Keying data using optical pockels crystal

Electro-optic material has a great advantage for optical modulation. Phase modulation has been successfully implemented with the help of linear electro-optic Pockels materials. One can incorporate the idea of phase modulation to develop Phase Shift Keying (PSK) signal. A series of linear electro-optic Pockels materials with a fixed biasing voltage has been utilized to construct a theoretical model of PSK. PSK with light introduces the OFF state as zero phase change and the ON state as the π phase change of an incident carrier light wave. In this proposed scheme, a series of Pockels cells are used with a common biasing voltage. The voltage is given in such a way that the light after travelling through the series of Pockels cells gets a phase change ‘ π ’ for that voltage. This voltage is considered as Boolean ‘1’ and when there is no voltage applied (Boolean ‘0’) no phase change is expected.