All-Optical Binary Decrementer Using Terahertz Optical Asymmetric Demultiplexer Switches

Interferometric devices are gaining attention in all-optical computation of signals, where they are praised for their rapid connectivity photonic capabilities and inventiveness. The invention of Terahertz Optical Asymmetric Demultiplexer (TOAD)-based gates was a big step forward in this arena. These gates require less than one picojoule of switching energy and offer possibilities for chip-level fabrication. This chapter proposes an all-optical binary decrementer design using TOAD-based switches. A digital module, the decrementer, executes a one-step countdown in a single clock cycle. It used extensively in digital systems. The proposed design is more efficient in terms of speed and hardware complexity. A conceptual framework is provided and a computational simulation is used to validate it. This technique offers quicker computation and more precision. This scheme may be adapted to investigate more sophisticated all-optical circuits with greater performance, with the decrementer serving as a fundamental building element.