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All-optical D flip-flop using single quantum-dot semiconductor optical amplifier assisted Mach–Zehnder interferometer

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Abstract

A scheme for an ultra-high speed all-optical D flip-flop based on single quantum-dot semiconductor optical amplifier (QD-SOA) assisted Mach–Zehnder interferometer (MZI) is proposed and its performance is theoretically investigated. The architecture of the all-optical circuit comprises of a properly driven and configured single QD-SOA-MZI with an external feedback loop. The impact of the input data pulse width as well as of the QD-SOAs length on the extinction ratio, contrast ratio, Q factor, relative opening of the pseudo-eye diagram and amplitude modulation of the switching outcome is explored and assessed by means of numerical simulations. The obtained results confirm the feasibility of the devised flip-flop scheme at a much higher data rate than that enabled by the conventional SOA-assisted MZI, with acceptable performance metrics.

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Authors and Affiliations

  1. Department of Computer Science & Engineering, College of Engineering & Management, Kolaghat, KTPP Township, Purbamedinipur, 721171, West Bengal, India

    Dilip Kumar Gayen

  2. Mechanical Operation (Stage-II), Kolaghat Thermal Power Station, A Unit of WBPDCL, Govt. of West Bengal Enterprise, Purbamedinipur, 721137, West Bengal, India

    Tanay Chattopadhyay

  3. Department of Electrical & Computer Engineering, Lightwave Communications Research Group, Democritus University of Thrace, 67 100, Xanthi, Greece

    Kyriakos E. Zoiros

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  1. Dilip Kumar Gayen
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Correspondence to Tanay Chattopadhyay.

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Gayen, D.K., Chattopadhyay, T. & Zoiros, K.E. All-optical D flip-flop using single quantum-dot semiconductor optical amplifier assisted Mach–Zehnder interferometer. J Comput Electron 14, 129–138 (2015). https://doi.org/10.1007/s10825-014-0632-6

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