A nonlinear material-based all-optical switching mechanism is utilized here to realize the J-K and J-K master-slave ͑J-K M-S͒ flipflops. As the flip-flops are sequential logic circuits, the present states of outputs are dependent not only on the present inputs but also on the past outputs. In our present scheme, the outputs are fed back to the former stages as well as the input stages. The output of each flip-flop and its complement are obtained simultaneously in our scheme.

A nonlinear-material-based all-optical switching mechanism is utilized to develop the optical flip-flop. As flip-flops are sequential logic circuits, the present state of outputs is dependent on both the present inputs as well as the past outputs. In our present scheme, the outputs are fed back to the former stages instead of the input stages. The output Q and its complemented Q are obtained simultaneously in our scheme.

This paper demonstrates an all-optical 1-bit Random Access Memory (RAM) with massive use of nonlinear material. All-optical switching mechanism is exploiting here to realize the all-optical 1-bit RAM. The all-optical switch by a composite slab of linear medium (LM) and non-linear medium (NLM) is the building block of our proposed 1-bit RAM circuit. An all-optical clocked D flip flop is the main storing element of the RAM. These circuits are simple and all-optical in nature. It can also gear up to the highest capability of optical performance in high-speed all-optical data storing, computing and communicating system.

Non-linear material based all-optical switching mechanism is utilized here to implement the all-optical parallel subtraction scheme. Optical tree architectures here convert analog optical signal to the corresponding digital one. A two bit all-optical binary parallel subtractor has been proposed and which may be elevated to a higher bit parallel subtractor in course using all-optical half-subtractor and a full-subtractor. These are constructed by a composite slab of linear medium (LM) and non-linear medium (NLM) and it is the building block of our proposed subtructor circuit. These circuits are all-optical and fully parallel in nature. It can also gear up to the highest ability of optical performance in high-speed all-optical computing system.

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