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.

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.

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.

Extinction ratio improvement by an all-optical signal regenerator with a semiconductor optical amplifier and a Sagnac loop

2006 ◽  
Vol 266 (1) ◽  
pp. 80-87
Author(s):  
Er’el Granot ◽  
Shalva Ben-Ezra ◽  
Reuven Zaibel ◽  
Haim Chayet ◽  
Niv Narkiss ◽  
...  
Keyword(s):  
Semiconductor Optical Amplifier ◽  
Extinction Ratio ◽  
Optical Amplifier ◽  
Optical Signal ◽  
All Optical

Evaluating RSOA Performance with Optical Logic Gates at 100 Gbps Data Rate

2018 ◽  
Vol 0 (0) ◽  
Author(s):  
Devendra Kr. Tripathi
Keyword(s):  
Carrier Density ◽  
Extinction Ratio ◽  
Optical Computing ◽  
Logic Gates ◽  
Optical Amplifier ◽  
Data Rate ◽  
Optical Logic ◽  
Active Length ◽  
Optical Logic Gates ◽  
All Optical

AbstractAll optical logic gates are the key elements of contemporary optical computing unit. For that non-linear attribute of reflective semiconductor optical amplifier (RSOA) is exploited to configure optical logic gates. Accordingly, in the manuscript all optical OR/NOR/Buffer binary logic network for the nonreturn to zero format has been designed. Its operation at 100 Gbps data rate has been successfully realized. For the applied data inputs in nonreturn to zero patterns, their corresponding output waveforms for the stated logic action have been verified. Numerical investigations for the imperative design constraints as data rate, injected power and imperative elements of the semiconductor optical amplifiers (SOAs) pump current, carrier density, active length, confine factor, laser power has been appropriately executed with optimum performance. It has depicted good extinction ratio (>10 dB) performance with confine factor more than 0.2 and higher carrier density of amplifier. Further, it also accomplished, that for the OR, buffer logic execution with lower power of pump laser and for the NOR logic execution higher power laser pump source is required. The proposed design could fulfill need for the impending higher data rate composite optical computing units.

Simulative Approach to Realize All Optical-Frequency-Encoded Dibit-Based Integrated Logic Gates

2019 ◽  
pp. 142-163
Author(s):  
Bitan Ghosh ◽  
Partha Pratim Sarkar
Keyword(s):  
Frequency Conversion ◽  
Logic Gate ◽  
Logic Gates ◽  
Optical Amplifier ◽  
Control Input ◽  
Potential Candidate ◽  
Optical Logic ◽  
All Optical ◽  
Representation Technique ◽  
Integrated Logic

Optics is considered a potential candidate for the realization of logic devices, digital optical systems for communication, and computation exploiting its super-fast speed. Optical logic gates also can act on the basis of frequency conversion process of some nonlinear materials. Further, in this chapter, the authors have mentioned the dibit representation technique for reducing bit error problem at the input and output terminals of all optical digital logic circuits and a control input for selecting particular logic operation. Here the authors have proposed frequency encoded all optical dibit-based integrated AND and OR logic gates with control input, where a single circuit acts as both AND logic gate and OR logic gate using the optical switches like reflected semiconductor optical amplifier and add/drop multiplexer.

scholarly journals Quadruple multi-wavelength conversion for access network scalability based on cross-phase modulation in an SOA-MZI

Open Physics ◽  
2017 ◽  
Vol 15 (1) ◽  
pp. 1077-1085 ◽  
Author(s):  
Mohammad Syuhaimi Ab-Rahman ◽  
Abdulhameed Almabrok Swedan
Keyword(s):  
Phase Modulation ◽  
Data Exchange ◽  
Continuous Wave ◽  
Single Channel ◽  
Extinction Ratio ◽  
Optical Amplifier ◽  
Optical Signal ◽  
Wavelength Converter ◽  
Cross Phase Modulation ◽  
Multi Wavelength

AbstractThe emergence of new services and data exchange applications has increased the demand for bandwidth among individuals and commercial business users at the access area. Thus, vendors of optical access networks should achieve a high-capacity system. This study demonstrates the performance of an integrated configuration of one to four multi-wavelength conversions at 10 Gb/s based on cross-phase modulation using semiconductor optical amplifier integrated with Mach–Zehnder interferometer. The Opti System simulation tool is used to simulate and demonstrate one to four wavelength conversions using one modulated wavelength and four probes of continuous wave sources. The wavelength converter processes are confirmed through investigation of the input and output characteristics, optical signal-to-noise ratio, conversion efficiency, and extinction ratio of new modulated channels after separation by demultiplexing. The outcomes of the proposed system using single channel indicate that the capacity can increase from 10 Gb/s to 50 Gb/s with a maximum number of access points increasing from 64 to 320 (each point with 156.25 Mb/s bandwidth). The splitting ratio of 1:16 provides each client with 625 Mb/s for the total number of 80 users. The Q-factor and bit error rate curves are investigated to confirm and validate the modified scheme and prove the system performance of the full topology of 25 km with 1/64 splitter. The outcomes are within the acceptable range to provide the system scalability.

All-Optical Switching Device Using Plasmonic Mach-Zehnder Interferometer Structure

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Lokendra Singh ◽  
Santosh Kumar ◽  
Brajesh Kumar Kaushik
Keyword(s):  
Optical Switching ◽  
Logic Gate ◽  
Extinction Ratio ◽  
Logic Gates ◽  
Zehnder Interferometer ◽  
Matlab Simulation ◽  
All Optical ◽  
Mathematical Computation ◽  
All Optical Switching ◽  
Mach Zehnder Interferometer

AbstractThe basic logic gates play a key role in performing the mathematical computation. The plasmonics has the uniqueness of confining surface plasmons beyond the diffraction limit. Plasmonic-based Mach-Zehnder interferometer with an extinction ratio of 26 dB is proposed to design the structure of all-optical XOR and XNOR logic gate. A theoretical analysis of proposed gate is carried out using finite-difference-time-domain method and MATLAB simulation results.

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.

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