All-optical ultrafast logic gates that use asymmetric nonlinear directional couplers

1991 ◽  
Vol 16 (21) ◽  
pp. 1641 ◽  
Author(s):  
C. C. Yang
Keyword(s):  
Logic Gates ◽  
Directional Couplers ◽  
All Optical

Frequency Encoded All Optical Tri-state Logic Gates NOT and NAND Using Semiconductor Optical Amplifier Based Interferometric Switches

2020 ◽  
Vol 10 (4) ◽  
pp. 369-380
Author(s):  
K. Maji ◽  
K. Mukherjee ◽  
A. Raja
Keyword(s):  
Semiconductor Optical Amplifier ◽  
Extinction Ratio ◽  
Optical Power ◽  
Logic Gates ◽  
Optical Amplifier ◽  
All Optical ◽  
State Frequency ◽  
Spontaneous Noise ◽  
First Time ◽  
Practical Feasibility

All optical tri-state frequency encoded logic gates NOT and NAND are proposed and numerically investigated using TOAD based interferometric switch for the first time to the best of our knowledge. The optical power spectrum, extinction ratio, contrast ration, and amplified spontaneous noise are calculated to analyze and confirm practical feasibility of the gates. The proposed device works for low switching energy and has high contrast and extinction ratio as indicated in this work.

Regenerative and reconfigurable all-optical logic gates for ultra-fast applications

2005 ◽  
Vol 41 (7) ◽  
pp. 435 ◽  
Author(s):  
A. Bogoni ◽  
L. Potì ◽  
R. Proietti ◽  
G. Meloni ◽  
F. Ponzini ◽  
...  
Keyword(s):  
Logic Gates ◽  
Optical Logic ◽  
Optical Logic Gates ◽  
All Optical

scholarly journals Band-Gap Solitons in Nonlinear Photonic Crystal Waveguides and Their Application for Functional All-Optical Logic Gating

Photonics ◽  
2021 ◽  
Vol 8 (7) ◽  
pp. 250
Author(s):  
Vakhtang Jandieri ◽  
Ramaz Khomeriki ◽  
Tornike Onoprishvili ◽  
Daniel Erni ◽  
Levan Chotorlishvili ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Band Gap ◽  
Crystalline Silicon ◽  
Logic Gates ◽  
Photonic Crystal Waveguides ◽  
Optical Logic ◽  
Logical Operation ◽  
Pulse Envelope ◽  
Gap Soliton ◽  
All Optical

This review paper summarizes our previous findings regarding propagation characteristics of band-gap temporal solitons in photonic crystal waveguides with Kerr-type nonlinearity and a realization of functional and easily scalable all-optical NOT, AND and NAND logic gates. The proposed structure consists of a planar air-hole type photonic crystal in crystalline silicon as the nonlinear background material. A main advantage of proposing the gap-soliton as a signal carrier is that, by operating in the true time-domain, the temporal soliton maintains a stable pulse envelope during each logical operation. Hence, multiple concatenated all-optical logic gates can be easily realized paving the way to multiple-input ultrafast full-optical digital signal processing. In the suggested setup, due to the gap-soliton features, there is no need to amplify the output signal after each operation which can be directly used as a new input signal for another logical operation. The efficiency of the proposed logic gates as well as their scalability is validated using our original rigorous theoretical formalism confirmed by full-wave computational electromagnetics.

scholarly journals A novel proposal based on 2D linear resonant cavity photonic crystals for all-optical NOT, XOR and XNOR logic gates

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Kouddad Elhachemi ◽  
Naoum Rafah
Keyword(s):  
Finite Difference Time Domain ◽  
Resonant Cavity ◽  
Logic Gates ◽  
Low Power Consumption ◽  
Plane Wave Expansion ◽  
Novel Structure ◽  
All Optical ◽  
Easy Integration ◽  
Two Dimensional Photonic Crystal ◽  
Difference Time

AbstractIn this paper, we are going to propose a novel structure of all-optical NOT, XOR and XNOR logic gates are presented using a two-dimensional photonic crystal (2D-PhC). This structure is optimized by varying the radius of the cavity, to obtain a quality factor Q = 1192, and also has several ports of entry and one port of output. The size of each structure is equal to 85.8 μm2. The contrast ratios for the structures proposed all-optical NOT, XOR and XNOR logic gates between levels “0” and “1” are, respectively, 25.08, 25.03, and 14.47 dB. The response time for the three logical gates is 8.33 ps, and the bit rate is calculated at about 0.12 Tbit/s, all simulations are based on both numerical methods such as finite difference time domain (FDTD) and plane wave expansion (PWE). Designed logic gates are characterized by low power consumption, compactness and easy integration.

All optical NAND/NOR and majority gates using nonlinear photonic crystal ring resonator

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Hassan Mamnoon-Sofiani ◽  
Sahel Javahernia
Keyword(s):  
Photonic Crystal ◽  
Ring Resonator ◽  
Logic Gates ◽  
Building Blocks ◽  
Optical Data ◽  
Optical Logic ◽  
Optical Logic Gates ◽  
Nonlinear Photonic Crystal ◽  
All Optical ◽  
Photonic Crystal Ring Resonator

Abstract All optical logic gates are building blocks for all optical data processors. One way of designing optical logic gates is using threshold switching which can be realized by combining an optical resonator with nonlinear Kerr effect. In this paper we showed that a novel structure consisting of nonlinear photonic crystal ring resonator which can be used for realizing optical NAND/NOR and majority gates. The delay time of the proposed NAND/NOR and majority gates are 2.5 ps and 1.5 ps respectively. Finite difference time domain and plane wave expansion methods were used for simulating the proposed optical logic gates. The total footprint of the proposed structure is about 988 μm2.

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