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Present article suggested and proposed a new design of 4-bit optical sequence detector using an electro-optic effect by utilizing Lithium niobate (LiNbO 3 ) based Mach–Zehnder interferometer, because of its consistency about production and stability. Suggested sequential detector is designed by OptiBPM (optical beam propagation method) software. This structure uses EO effect to alter the light upon lithium niobate optical waveguide via cross-state to bar-state and replica. Sequence detector is a sequential state machine, that extract an input string of bits and, when the targeted bit has been detected, then it gives an output as 1. In this paper the authors have focused on all-optical 4-bit sequential detector to produce the outcome as 1 when the bit sequence finds as 1101 within the given data. This all-optical device can be utilized in several optical switching and networking operations. The suggested design is replicated with MATLAB along with mathematical descriptions too and has been verified.

Design and performance analysis of optical sequence detector using lithium niobate-based Mach–Zehnder interferometers