Abstract
An all-optical universal shift register using silicon waveguide microring resonators (MRRs) to form a nonlinear all-optical switch is proposed and described. Such devices can be used as building blocks for optical computing and information processing systems. The proposed device comprises two optical multiplexers and two optical D flip-flops. Each optical D flip-flop consists of a single microring resonator, sharing the same clock pulse. Each multiplexer consists of two microring resonators controlled by optical pump pulses to perform bidirectional shifting and parallel in/parallel out operations on optical signals. Numerical simulation results confirming the described approach are presented. Based on the numerical simulation results, we specify a combination of feasible MRR radius and detuning which enables analysis of system performance parameters for the scheme such as the maximum amplitude difference between marks, between spaces, and between marks and spaces.
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