scholarly journals A novel proposal for ultra-fast all optical half subtractor based on nonlinear ring resonators

2021 ◽  
Author(s):  
Niloofar Khajeheian ◽  
Jasem Jamali ◽  
Mohammadhossein Fatehi-Dindarlou ◽  
Mehdi Taghizadeh
Keyword(s):  
Optical Waveguides ◽  
Contrast Ratio ◽  
Ring Resonators ◽  
Optical Logic ◽  
Logic Device ◽  
System Operation ◽  
Operation Speed ◽  
Novel Structure ◽  
Optical Computation ◽  
All Optical

Abstract Optical half subtractors are required for designing any optical computation system. Operation speed and the on/off contrast ratios are very important characteristics for any optical logic device. A novel structure composed of three nonlinear ring resonators and some optical waveguides are used for designing for the proposed half subtractor with improved operation speed and on/off contrast ratio. The simulation results show that the rise time for this structure is 1.5 ps. Also the on/off contrast ratios for B and D are 13.7 dB and 14.5 dB respectively.

A Novel Proposal for All-Optical OR/AND Gate Using Nonlinear Photonic Crystal Ring Resonators

2020 ◽  
Vol 41 (3) ◽  
pp. 263-267
Author(s):  
Mohammad Reza Geraili ◽  
Seyed Ebrahim Hosseini
Keyword(s):  
Photonic Crystal ◽  
Time Delay ◽  
Optical Waveguides ◽  
Logic Gates ◽  
Input Power ◽  
Ring Resonators ◽  
Optical Logic ◽  
Nonlinear Photonic Crystal ◽  
All Optical ◽  
Optical Structure

AbstractIn this paper, we aim to design an all-optical structure that can be employed as optical OR/AND logic gates. To do so, a nonlinear photonic crystal-based ring resonator will be designed whose resonant wavelength depends on the variation of optical intensity. Then, by adding some optical waveguides, the optical logic circuit structure will be obtained that can function as optical OR/AND logic gates. The maximum time delay for the proposed structure is about 1.5 ps. Total footprint of the proposed structure is about 372 mm2. The proposed structure has lower time delay, lower footprint and lower optical input power compared with previously proposed structures.

Ultrafast all optical XOR gate using photonic crystal-based nonlinear ring resonators

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Alireza Shamsi
Keyword(s):  
Photonic Crystal ◽  
Contrast Ratio ◽  
Logic Gates ◽  
Optical Devices ◽  
Ring Resonators ◽  
Optical Data ◽  
Optical Logic ◽  
Xor Gate ◽  
Optical Logic Gates ◽  
All Optical

Abstract Optical logic gates can play crucial roles for designing all optical data processing circuits. Photonic crystals are one of the suitable platforms that can be used for designing all optical devices. In this paper an optical XOR gate was designed using nonlinear ring resonators. The proposed structure works are based on threshold switching. The working wavelength and the switching threshold of the resonators are 1550 nm and 1.8 W/μm2, respectively. The rise time is about 1 ps and the ON/OFF contrast ratio is about 16 dB.

Compact and ultrafast all optical 1-bit comparator based on wave interference and threshold switching methods

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Asghar Askarian
Keyword(s):  
Finite Difference Time Domain ◽  
Contrast Ratio ◽  
Logical Structure ◽  
Ring Resonators ◽  
Plane Wave Expansion ◽  
Threshold Switching ◽  
Wave Interference ◽  
All Optical ◽  
Fdtd Methods ◽  
Difference Time

Abstract In this study, we are going to design all optical 1-bit comparator by combining wave interference and threshold switching methods. The final structure composed of two nonlinear ring resonators and seven waveguides. The functionality of the suggested logical structure is analyzed and simulated by using plane wave expansion (PWE) and finite difference time domain (FDTD) methods. According to results, the proposed all optical 1-bit comparator has faster response and smaller footprint than all previous works. The maximum ON-OFF contrast ratio, delay time and area of the suggested optical comparator are about 16.67 dB, 1.8 ps, and 513 µm2, respectively.

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 Logic Device Using Bent Nonlinear Tapered Y-Junction Waveguide Structure

2001 ◽  
Vol 20 (5) ◽  
pp. 517-524 ◽  
Author(s):  
Yaw-Dong Wu ◽  
Mao-Hsiung Chen ◽  
Chin-Hsuan Chu
Keyword(s):  
Waveguide Structure ◽  
Optical Logic ◽  
Logic Device ◽  
All Optical ◽  
Optical Logic Device

Numerical Analysis of Ultrafast Performances of All-Optical Logic-Gate Devices Integrated With InAs QD-SOA and Ring Resonators

2013 ◽  
Vol 49 (1) ◽  
pp. 51-58 ◽  
Author(s):  
Atsushi Matsumoto ◽  
Keichiro Kuwata ◽  
Asuka Matsushita ◽  
Kouichi Akahane ◽  
Katsuyuki Utaka
Keyword(s):  
Numerical Analysis ◽  
Logic Gate ◽  
Ring Resonators ◽  
Optical Logic ◽  
All Optical ◽  
Optical Logic Gate

An All Optical NAND Gate Using Nonlinear Photonic Crystal Ring Resonators

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Ehsann Barmala
Keyword(s):  
Photonic Crystal ◽  
Optical Communications ◽  
Delay Time ◽  
Ring Resonators ◽  
Nand Gate ◽  
Combinational Circuits ◽  
Nonlinear Photonic Crystal ◽  
Novel Structure ◽  
All Optical ◽  
Universal Gate

AbstractOptical NAND gate is a universal gate which can be used for implementing different kinds of combinational circuits without using other gates. Due to significance of optical NAND gates in the optical communications, in this paper we proposed a novel structure for designing an all optical NAND gate based on photonic crystal structures. The proposed structure was designed using threshold switching mechanism which can be implemented using nonlinear ring resonators. In the proposed structure delay time is about 2.3 ps.

All-optical integrated 2-to-4 decoder and 1-to-4 demultiplexer circuit with enable using SOA based MZI

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Nivedita Nair ◽  
Sanmukh Kaur ◽  
Hardeep Singh
Keyword(s):  
Extinction Ratio ◽  
Contrast Ratio ◽  
Logic Device ◽  
Optical Processing ◽  
Timing Diagrams ◽  
Passive Devices ◽  
Input Signals ◽  
All Optical ◽  
Eye Opening ◽  
Easy Integration

AbstractIn this paper, we propose an all-optical integrated 2-to-4 decoder and a 1-to-4 demultiplexer circuit using SOA based MZI (Mach–Zehnder Interferometer) architecture. The proposed device has been applied an enable signal along with two data input signals at the same wavelength. Four output signals from 2-to-4 decoder and 1-to-4 demultiplexer have been attained at the same wavelength. The output timing diagrams of 2-to-4 decoder and 1-to-4 demultiplexer for different input data conditions with clear eye opening patterns confirms the operation of the proposed logic device at 10 Gb/s. Maximum value of extinction ratio, contrast ratio and minimum value of amplitude modulation achieved for the different output waveforms are 12, 9.5 and 0.1 dB respectively. Easy integration with active and passive devices and simple architecture makes this device suitable for all-optical processing.

Sign in / Sign up

Export Citation Format

Share Document