Designing a Circuit for High-Speed Optical Logic Half Subtractor

Parandin, Fariborz; Sheykhian, Arezoo

doi:10.46300/9106.2022.16.109

Cited by 16 publications

(6 citation statements)

References 33 publications

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“…The wavelengths that are destructive in this process are PBG. [28][29][30][31][32][33][34][35][36][37] D flip-flop is a variant of the SR flip-flop. The inputs of the SR type flip-flop (SET and RESET) should not be in the S = R = 0 state because this will cause both outputs to go to logic 1.…”

Section: Introductionmentioning

confidence: 99%

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A novel design of an all‐optical D flip‐flop based on 2D photonic crystals

Parandin,

Sheykhian,

Askarian

2024

Micro & Optical Tech Letters

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In this study, we endeavored to create and simulate a D‐type flip‐flop utilizing two‐dimensional photonic crystals featuring a square lattice. This flip‐flop, composed of just two intersecting waveguides, is both compact and straightforward. Constructed from 10 × 10 dielectric rods suspended in air, it boasts low output power in logic mode 0, creating a significant distinction between optical powers in modes 0 and 1, lending it a logical aspect. Optimized for operation at a communication wavelength of 1.55 µm, this flip‐flop proves suitable for optical communication systems. The third window optical fiber communication system is suitable for 1.55 μm wavelength because the fiber has the lowest loss. Our analysis involved calculating the band structure via the plane wave expansion method and determining the optical power distribution using the finite difference time domain method.

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Section: Introductionmentioning

confidence: 99%

“…These scatterings cause Constructive Interference in some directions and wavelengths and Destructive Interference in others. The wavelengths that are destructive in this process are PBG 28–37 …”

Section: Introductionmentioning

confidence: 99%

A novel design of an all‐optical D flip‐flop based on 2D photonic crystals

Parandin,

Sheykhian,

Askarian

2024

Micro & Optical Tech Letters

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“…Various logic gates have been developed based on this structure so far. Also, combinational and sequential logic circuits have been designed using photonic crystals, which are faster than electronic gates and circuits [24][25][26][27][28][29][30][31][32][33][34][35][36][37][38][39][40][41][42].…”

Section: Introductionmentioning

confidence: 99%

A novel design for an ultracompact optical majority gate based on a ring resonator on photonic crystal substrate

Parandin

Sheykhian

Bagheri³

2023

J Comput Electron

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This paper tries to design and simulate a majority gate with three inputs based on the resonance ring of 2D photonic crystals. In the design of this gate, a resonator gate and 4 waveguides in a square lattice have been used. This structure is simple and small with dielectric rods of silicon on an air substrate. Low and high logics are de ned based on the optical sources being on or off. The large interval between 0 and 1 at the output demonstrates high accuracy of this optical gate. The operating wavelength of this optical majority gate is 1.55µm, which is in the photonic band-gap calculated for the gate structure. Calculations are carried out in the TM mode using the FDTD numerical method.

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“…In this method the optical device is constructed based on constructive and destructive interference phenomenon of optical beams. Many optical devices such as isolator, decoder, gates, adders, subtractors, comparators, convertors and multiplexer were made with this procedure [15][16][17][18][19][20][21][22][23][24][25]. The functional parameters of these optical devices including ON-OFF contrast ratio (CR), bit rate (BR), optical intensity (OI), fall, rise and delay times (T r , T f andT d ) and total footprint (TFP) were evaluated.…”

Section: Introductionmentioning

confidence: 99%

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

Askarian

Parandin

2022

J Comput Electron

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In this paper, we are going to employ seven optical waveguides (OWGs) based on two-dimensional (2D) linear photonic crystal (LPhC) for realizing an all optical comparator (AOCMP). The proposed 1-bit AOCMP has a very simple structure with a footprint of 351 μm 2 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 nite 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 (NP) at ON and OFF states for output ports are 73% and 15%, respectively. Also, the ON-OFF contrast ratio (CR), bit rate (BR), rise and fall times (T r and T f ) of the suggested design are about 6.87 dB, 2.22 Tb/S, 0.15ps and 0.05ps, respectively.

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Designing a Circuit for High-Speed Optical Logic Half Subtractor

Cited by 16 publications

References 33 publications

A novel design of an all‐optical D flip‐flop based on 2D photonic crystals

A novel design of an all‐optical D flip‐flop based on 2D photonic crystals

A novel design for an ultracompact optical majority gate based on a ring resonator on photonic crystal substrate

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

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