All-Optical Half Adder Based on a 2x2 Multimode Interference Coupler

2018 ◽  
Vol 4 (1) ◽  
pp. 9
Author(s):  
Dao Duy Tu ◽  
Linh Duc Tam Ho ◽  
Dung Truong Cao ◽  
Hung Tan Nguyen
Keyword(s):  
Optical Networks ◽  
Logic Gate ◽  
Extinction Ratio ◽  
Optical Signal ◽  
Multimode Interference ◽  
Optical Logic ◽  
Index Method ◽  
Half Adder ◽  
All Optical ◽  
Multimode Interference Coupler

In this paper, an all-optical logic gate based on 2x2 (MMI) multimode interference coupler is theoretically designed and simulated using three-dimensional beam propagation method (3D-BPM) and effective index method (EIM) to analyze and evaluate the performance of the device. The proposed device is used to convert phase information of input optical signals to amplitude at the output ports of MMI. With this mechanism, the device can operates as a logical half adder. Simulation results show that the optical half adder archives with insertion loss and extinction ratio from ON to OFF logic–level below 0.7 dB and over 40 dB, respectively. Furthermore, wide bandwidth of 100nm is also an advantage of this devices. Therefore, it can be applied to all optical signal processing in next generation optical networks as well as in photonics integrated circuits.

Analysis of all optical logic gate based on photonic crystals multimode interference

2010 ◽  
Author(s):  
Hong-Seung Kim ◽  
Tae-Kyung Lee ◽  
Geum-Yoon Oh ◽  
Doo-Gun Kim ◽  
Young-Wan Choi
Keyword(s):  
Photonic Crystals ◽  
Logic Gate ◽  
Multimode Interference ◽  
Optical Logic ◽  
All Optical ◽  
Optical Logic Gate

Investigations with Reversible Feynman Gate and Irreversible Logic Schematics

2019 ◽  
Vol 40 (4) ◽  
pp. 385-392
Author(s):  
Devendra Kr. Tripathi
Keyword(s):  
Optical Networks ◽  
Carrier Transport ◽  
Heat Dissipation ◽  
Logic Gate ◽  
Extinction Ratio ◽  
Pump Current ◽  
Optical Amplifier ◽  
Optical Logic ◽  
Optical Processing ◽  
Feynman Gate

Abstract In the contemporary world there is enormous hike in communication engineering applications, outcome with massive heat dissipation from the processing nodes. So energy efficient information network is one of paramount issue nowadays. For that optical reversible computing could be a landmark with base as optical logic gate. Reduction in power dissipation, consumption could be accomplished through a blend of reversible and irreversible optical processing and the nodes may recuperate the data. Accordingly, in this article two designs with semiconductor optical amplifier, used as Mach–Zehnder interferometer based all optical reversible Feynman gate, irreversible AND logic gate within a single photonic circuit has been proposed. The output waveforms for AND logic operation, Feynman logic the P (data output identical to input), Q (A ⊕ B) has been verified at 100 Gbps data rate. The designs have been evaluated on the basis of key parameter extinction ratio factor. Numerical simulations have inferred excellent ER performance with design-2(ER>13 dB) in contrast to design-1(ER as 10.2 dB). Performance evaluations for significant deign parameters as pump current, length, width, carrier transport, confine and current injection factor yielded excellent performance. This evaluation could be an assist toward design of contemporary optical networks.

scholarly journals All-Optical NOT Gate Based on Nanoring Silver-Air Plasmonic Waveguide

2018 ◽  
Vol 7 (4) ◽  
pp. 2818
Author(s):  
Hassan Falah Fakhruldeen ◽  
Tahreer Safaa Mansour
Keyword(s):  
Logic Gate ◽  
Incident Light ◽  
Optical Signal ◽  
Ring Structure ◽  
Dielectric Waveguides ◽  
Plasmonic Waveguides ◽  
Optical Logic ◽  
Metal Insulator Metal ◽  
All Optical ◽  
Control Port

In this work, all-optical plasmonic NOT logic gate was proposed by using metal-insulator-metal (MIM) plasmonic waveguides design. This logic gate is numerically analyzed by COMSOL Multiphysics 5.3a. Recently, plasmonics have attracted more attention due to its huge applications in all optical signal processing. Due to it’s highly localization to metallic surfaces, surface plasmon (SP) may have many applications in sub wavelength to guide the optical signal in waveguides to overcome the diffraction limit which considered a big problem in conventional optics. The proposed design of MIM structure is consist of a dielectric waveguides plus metallic claddings, which guide the incident light strongly in the insulator region. Strong localization and relatively simple fabrication make the MIM waveguides the potential key design of Nano-scale all optical devices. Our design consists of symmetric ring structures with straight waveguides which based on MIM structure. All-optical logic gate (NOT gate) behavior is achieved from utilizing the interface between straight waveguides and ring structure waveguides. By switching the activation of the control port, the propagation of the outgoing field in the output waveguide will be changed. As the simulation results show, the proposed structure could operate as an all-optical NOT logic gate. This gate would be a potential component in many applications of all-optical signals processing.  

All-Optical XOR Logic Gates: Insights and Comparisons

2015 ◽  
Vol 815 ◽  
pp. 353-358 ◽  
Author(s):  
Mohd Azarulsani Md Azidin ◽  
M.H.A. Wahid ◽  
N.A.M. Ahmad Hambali ◽  
M.M. Shahimin ◽  
A. Zakiah Malek
Keyword(s):  
Phase Modulation ◽  
Signal To Noise Ratio ◽  
Logic Gate ◽  
Extinction Ratio ◽  
Logic Gates ◽  
Optical Amplifier ◽  
Optical Signal ◽  
Signal Quality ◽  
Gain Modulation ◽  
All Optical

Three XOR photonics logic gate configurations namely semiconductor optical amplifier-Mach Zender interferometer cross phase modulation (SOA-MZI XPM), SOA-MZI cross gain modulation (XGM) and terahertz optical asymmetrical demultiplexer (TOAD) XOR are analysed and compared in terms of generated power, optical signal-to-noise ratio (OSNR) values and bit error rate (BER) signal quality. The highest generated power is possessed by the TOAD at 23.5 dBm, the SOA-MZI XPM showed the most extinction ratio or OSNR with 109.6 dB whereas the best BER is recorded in the SOA-MZI XGM at 4.42 x 10-22.

Performance analysis and parameter optimization of all-optical encryption using the FWM effect in semiconductor optical amplifier

2020 ◽  
Vol 0 (0) ◽  
Author(s):  
Vinayagam Sasikala ◽  
Krishnan Chitra
Keyword(s):  
Optical Networks ◽  
Semiconductor Optical Amplifier ◽  
Structural Parameters ◽  
Extinction Ratio ◽  
Optical Amplifier ◽  
Optical Logic ◽  
Optical Encryption ◽  
Number Systems ◽  
Highly Nonlinear ◽  
All Optical

AbstractThe demand for larger bandwidth to carry high capacity data in optical networks is increasing. Thus, it is expected to replace all digital logic with optical logic soon. Privacy and data security are also of utmost importance in all-optical networks. Generally, all-optical encryption has been carried out using (i) highly nonlinear fiber (HNLF) and (ii) Semiconductor Optical Amplifier (SOA) with interferometric structures. However, the former is limited by the requirement of a lengthy fiber and the latter one with more number of nonlinear components. In this work, an all-optical encryption process using nonlinear effects and four-wave mixing (FWM) in SOA without interferometric structure is presented for different number systems. The basic idea of the proposed system is to use delay operations which are carried out by duo binary modulation units whereas the encryption using single SOA is possible by FWM nonlinear effect. This combination of novel design for different number systems is optimized through SOA structural parameters, pump and probe signal power, and wavelength. Through optimization, the performance improvement is assured by a good extinction ratio of 11.5 dB for the active region length of less than 200 µm. Compared to the existing techniques, the quality factor is 2.28 times and 1.52 times better than HNLF and SOA-MZI, 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.

scholarly journals All-Optical Non-Inverted Parity Generator and Checker Based on Semiconductor Optical Amplifiers

2021 ◽  
Vol 11 (4) ◽  
pp. 1499
Author(s):  
Bingchen Han ◽  
Junyu Xu ◽  
Pengfei Chen ◽  
Rongrong Guo ◽  
Yuanqi Gu ◽  
...  
Keyword(s):  
Optical Amplifiers ◽  
Signal To Noise Ratio ◽  
Low Cost ◽  
Extinction Ratio ◽  
Semiconductor Optical Amplifiers ◽  
Optical Signal ◽  
Probe Light ◽  
All Optical ◽  
Negative Effect ◽  
Parity Generator

An all-optical non-inverted parity generator and checker based on semiconductor optical amplifiers (SOAs) are proposed with four-wave mixing (FWM) and cross-gain modulation (XGM) non-linear effects. A 2-bit parity generator and checker using by exclusive NOR (XNOR) and exclusive OR (XOR) gates are implemented by first SOA and second SOA with 10 Gb/s return-to-zero (RZ) code, respectively. The parity and check bits are provided by adjusting the center wavelength of the tunable optical bandpass filter (TOBPF). A saturable absorber (SA) is used to reduce the negative effect of small signal clock (Clk) probe light to improve extinction ratio (ER) and optical signal-to-noise ratio (OSNR). For Pe and Ce (even parity bit and even check bit) without Clk probe light, ER and OSNR still maintain good performance because of the amplified effect of SOA. For Po (odd parity bit), ER and OSNR are improved to 1 dB difference for the original value. For Co (odd check bit), ER is deteriorated by 4 dB without SA, while OSNR is deteriorated by 12 dB. ER and OSNR are improved by about 2 dB for the original value with the SA. This design has the advantages of simple structure and great integration capability and low cost.

Demonstration of All-Optical Logic Gate Device Using MQW-SOA and 10 Gbps XNOR Operation

2018 ◽  
Author(s):  
Yota Akashi ◽  
Shin’e Matsui ◽  
Shohei Isawa ◽  
Asuka Matsushita ◽  
Atsushi Matsumoto ◽  
...  
Keyword(s):  
Logic Gate ◽  
Optical Logic ◽  
All Optical ◽  
Optical Logic Gate

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
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