All-Optical Binary Counter by Using T Flip-Flop: An Implementation

All-optical T (Toggle) flip-flop with PReset (PR) and CLeaR (CLR) are basic building modules for the development of ultra-high speed all optical binary counter. In this paper, a non-linear material based all-optical switching mechanism is utilized here to realize the all-optical T flip-flop with PR and CLR. A composite slab of Linear Medium (LM) and Non-Linear Medium (NLM) is used to design the all-optical switch that exploit the attractive features of NLM. These all-optical T flip-flops can find application in the development of several complex all-optical circuits of enhanced performances. Here, the authors describe an all-optical binary 3-bit ripple counter which is nothing but the successive application of the flip flop. This circuit can elevate to a higher bit different counters.