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Abstract
This thesis is dedicated to all optical processors. All-optical processors play an important role in futuristic all-optical networks and their applications. In the literature several approaches for all-optical computing have been discussed, but in this thesis, we focus on all-optical processors based on optical hardware components. Electrical to optical and optical to electrical conversion limit the speed of photonic networks. The emergence of increasingly high speed, parallel and complex digital system demands all- optical digital devices such as logic gates, analog to digital converter, decoder, and multiplexer. So we propose and explore a set of all optical principles and device architectures which could exploit the speed and parallelism inherent in optics by using optical limiters, semiconductor optical amplifier, optical fibers, etc
The thesis introduces an all-optical XOR logic gate by using passive optical limiters which consist of alternating layers of materials possessing opposite Kerr non-linearity. It also explores and analyzes an all-optical full adder, Decoder, and all optical multiplexer
The thesis describes the design of all optical arithmetic logic unit by using of a set of optical full adders for the arithmetic unit and a set of optical multiplexers for the logic unit. The parallel adder and the arithmetic-logic unit are designed and numerically simulated. The thesis describes a novel all-optical binary counter that demonstrates the ability of all-optical digital processing to perform even more complex operations. An Optical n-bits parallel and serial shift registers that consist of n serially connected optical flip-flop memories driven by common clock pulses are demonstrated. An all-optical arithmetic multiplier with its control circuit is designed and numerically simulated.
Finally, the thesis illustrates a processor unit and the control unit of an optical fast central processor unit using optical hardware components. the optical arithmetic-logic unit, multiplier, counter, registers, and all optical logic circuits are used to central processor unit is demonstrated via simulations.