An All-Optical R-S Flip-Flop by Optical Non-Linear Material

In optical parallel computation the super fast switching speed is very much expected from the switching devices within the computer architecture. Several approaches were proposed in last few decades around the world where uses of non-liner and photo-refractive materials were seen massively in the purpose of developing switching devices. By the proper use of non-linear material logical operations (like NAND, AND, NOT, EX-OR gate) can be performed. These operations are all optical in nature. In this paper such an optical system is proposed which is capable to follow the truth table of a R-S flip-flop. Optical NAND and NOT gate are used here as basic building block.