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A novel proposal for all optical 1-bit comparator based on 2D linear photonic crystal

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Abstract

We employ seven optical waveguides based on two-dimensional linear photonic crystal (LPhC) to realize an all optical comparator (AOCMP). The proposed 1-bit AOCMP has a very simple structure with a footprint of 356 μm2 which is composed of 31 × 33 cubic lattice of silicon rods immersed in air. This LPhC comparator comprises two input ports and two output ports. The functionality of the proposed 1-bit AOCMP is based on constructive and destructive interference phenomenon of optical beams and phase shift keying technique. The finite difference time domain (FDTD) procedure based on Yee’s Algorithm is used to compute the propagation of optical waves in this structure. The FDTD simulation results of suggested 1-bit AOCMP indicate that the minimum and maximum values of the normalized power at ON and OFF states for output ports are 62% and 10%, respectively. Also, the ON–OFF contrast ratio, bit rate, rise and fall times (Tr and Tf) of the suggested design are about 7.92 dB, 2.22 Tb/S, 0.15 ps and 0.05 ps, respectively.

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Authors and Affiliations

  1. Department of Electrical Engineering, Arak Branch, Islamic Azad University, Arak, Iran

    Asghar Askarian

  2. Department of Electrical Engineering, Kermanshah Branch, Islamic Azad University, Kermanshah, Iran

    Fariborz Parandin

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  1. Asghar Askarian
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  2. Fariborz Parandin
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Correspondence to Fariborz Parandin.

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Askarian, A., Parandin, F. A novel proposal for all optical 1-bit comparator based on 2D linear photonic crystal. J Comput Electron 22, 288–295 (2023). https://doi.org/10.1007/s10825-022-01961-2

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