An ultra-fast all-optical RS flip-flop based on nonlinear photonic crystal structures

2018 ◽  
Vol 25 (4) ◽  
pp. 523-531 ◽  
Author(s):  
S. S. Zamanian-Dehkordi ◽  
M. Soroosh ◽  
G. Akbarizadeh
Keyword(s):  
Photonic Crystal ◽  
Crystal Structures ◽  
Flip Flop ◽  
Nonlinear Photonic Crystal ◽  
All Optical

An all optical photonic crystal half adder suitable for optical processing applications

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Hamed Azhdari ◽  
Sahel Javahernia
Keyword(s):  
Photonic Crystal ◽  
Optical Waveguides ◽  
High Speed ◽  
Building Blocks ◽  
Optical Signal ◽  
Ring Resonators ◽  
Optical Processing ◽  
Nonlinear Photonic Crystal ◽  
Half Adder ◽  
All Optical

Abstract Increasing the speed of operation in all optical signal processing is very important. For reaching this goal one needs high speed optical devices. Optical half adders are one of the important building blocks required in optical processing. In this paper an optical half adder was proposed by combining nonlinear photonic crystal ring resonators with optical waveguides. Finite difference time domain method wase used for simulating the final structure. The simulation results confirmed that the rise time for the proposed structure is about 1 ps.

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.

Concave Rectangle Photonic Crystal Ring Resonator for Ultra-Fast All-Optical Modulation

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Sana Rebhi ◽  
Radhouene Massoudi ◽  
Monia Najjar
Keyword(s):  
Photonic Crystal ◽  
Insertion Loss ◽  
Ring Resonator ◽  
Extinction Ratio ◽  
Input Power ◽  
Light Signal ◽  
Optical Modulator ◽  
Nonlinear Photonic Crystal ◽  
All Optical ◽  
Photonic Crystal Ring Resonator

AbstractIn this paper, an ultra-fast all-optical modulator, based on a new shape of nonlinear photonic crystal ring resonator, is designed and studied. Numerical methods such as plane wave expansion (PWE) and finite-difference time domain (FDTD) are used to perform simulations. The modulation technique consists of carrier light controlling by means of input light signal and Kerr effect. The investigation of extinction ratio and insertion loss within the carrier input power shows that the choice of 0.7 W is the optimal value of that power to ensure the tradeoff between both characteristics. The suggested modulator demonstrates an excellent extinction ratio about 20.8018, a very low insertion loss of −13.98 and a short switching time about 13.4 ps. According to the obtained results, the modulator can be considered as an ultra-fast and ultra-compact optical component.

Performance analysis of all optical 2 × 1 multiplexer in 2D photonic crystal structure

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Asghar Askarian
Keyword(s):  
Photonic Crystal ◽  
Optical Waveguides ◽  
Hexagonal Lattice ◽  
Optical Processing ◽  
Switching Speed ◽  
Fast Switching ◽  
Nonlinear Photonic Crystal ◽  
All Optical ◽  
Difference Time ◽  
Optical Structure

Abstract In optical processing systems, multiplexer is used to design optical devices such as arithmetic logic unit (ALU) and shift register (SR). Through this paper, we investigate the application of nonlinear photonic crystal ring resonator (PhCRR) based on nonlinear Kerr effect for realizing an all optical 2 × 1 multiplexer. The structure consists of two PhCRRs and five optical waveguides using hexagonal lattice silicon (Si) rods with a background of air. Performance of all optical 2 × 1 multiplexer is replicated with the help of finite difference time domain (FDTD) procedure at a wavelength of 1571 nm, and simulations presented an ultra-compact optical structure with ultra-fast switching speed.

Photonic Crystal and Quantum Dot Technologies for Ultra-small and Ultra-fast All-optical Flip-flop

2019 ◽  
Vol 16 (41) ◽  
pp. 31-37
Author(s):  
Nobuhiko Ozaki ◽  
Naoki Ikeda ◽  
Yoshinori Watanabe ◽  
Yoshiaki Takata ◽  
Yoshinori Kitagawa ◽  
...  
Keyword(s):  
Photonic Crystal ◽  
Quantum Dot ◽  
Flip Flop ◽  
All Optical

A New Proposal for Ultra-Compact Polarization Independent Power Splitter Based on Photonic Crystal Structures

2018 ◽  
Vol 39 (4) ◽  
pp. 375-379 ◽  
Author(s):  
Hadi Razmi ◽  
Mohammad Soroosh ◽  
Yousef S. Kavian
Keyword(s):  
Photonic Crystal ◽  
Crystal Structures ◽  
Optical Networks ◽  
Photonic Band Gap ◽  
Transmission Efficiency ◽  
Optical Polarization ◽  
Power Splitter ◽  
All Optical ◽  
Photonic Band ◽  
Polarization Independent

Abstract Polarization dependency imposes great limitations for application of optical device in optical networks and systems. In this paper, we are going to design and propose a 1*2 all optical polarization independent power splitter based on photonic crystal structures. For designing such a device we should employ a fundamental photonic crystal structure which has joint photonic band gap. The obtained results show that at 1,560 nm wavelength the final structure has transmission efficiency equal to 45 % for outputs in both TE and TM modes.

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