Abstract
Abstract Nowadays to process information on high speed and to reduce the complexity of digital devices, optical digital computational techniques are required. Many complex signal processing functions such as multiplexing, optical switching, addressing, coding/decoding are implemented using optical digital computational techniques. Optical logic gates are one of the most essential computational elements to design combinational and sequential circuits in optical signal processing. In this paper, all optical logic gates are designed with optimized structure of 2 × 2 Mach–Zehnder interferometer optical switch using Ti:LiNbO3 based waveguide at 1.46 µm employing electro-optic effect. Different design structures to realize all-optical logic gates are presented and compared with the previously designed optical logic gates. The mathematical description of all optical logic gates using cascaded structure of Mach–Zehnder interferometer switch is also defined. The performance parameters of designed optical logic gates have been analyzed by beam propagation method and the obtained results are verified by MATLAB.
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