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Design and simulation of half adder and half subtractor using lithium niobate-based waveguide

A. KUMARI1, A. PAL1,* , S. SHARMA2,3,4

Affiliation

  1. Department of Electronics & Comm. Engineering, DIT University, Dehradun-248009, India
  2. OMKARR Tech, New Delhi, India
  3. iNurture Education Solutions, Bengaluru, Karnataka, India
  4. Department of IT, Ajeenkya DY Patil University, Pune, Maharashtra, India

Abstract

Half adder and half subtractor are at the core of all arithmetic operations; these optical circuits add or subtract two input bits at a time to produce sum and carry or difference and borrow as outputs, respectively. In this work, Half adder/subtractor design based on the electro-optic principle is proposed. The operating speed of the proposed design is very fast as compared to its electronic counterpart. The design consists of a Mach-Zehnder interferometer as an optical switching device. Performance parameters like extinction ratio, contrast ratio, amplitude modulation, and insertion loss have been computed and obtained as 38.34 dB, 31.87dB, 0.16 dB, and 0.025 dB, respectively for the proposed device.

Keywords

Electro-optic effect, Mach-Zehnder interferometer, Beam propagation method, Half adder, Half subtractor, Optical computing.

Citation

A. KUMARI, A. PAL, S. SHARMA, Design and simulation of half adder and half subtractor using lithium niobate-based waveguide, Optoelectronics and Advanced Materials - Rapid Communications, 15, 7-8, July-August 2021, pp.314-324 (2021).

Submitted at: Sept. 14, 2020

Accepted at: Aug. 16, 2021