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Abstract

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.

Implementation of J–K and J–K master–slave flip-flops with nonlinear material in all-optical domain

“…There are some asynchronous-type flip-flops 29 also. An all-optical S-R, S-R with clock, and D-type flip-flops using nonlinear material 4,20 were also reported. In the present paper, we propose a scheme for alloptical implementation of synchronous J-K and J-K M-S flip-flops using nonlinear material as all-optical switches.…”

“…4,7,8,11,13,[19][20][21] These logic gates are implemented in optics by taking the presence of light signal as 1 and the absence of it as 0.…”

“…In view of these desirable features, several techniques have been reported to implement various arithmetic, 6,10,11 algebraic, 12-14 logic, 7,15,16 and image operations 17,18 in the optical domain. In the last few years, a nonlinear optical material-based all-optical switching mechanism 4,7,8,11,13,[19][20][21] proved its validity as one such promising technique. This is used to develop various combinational logic circuits 22 as well as sequential logic circuits 17,23 by many scientists and technologists.…”