Electrical Performances of Package Layout for High Speed Networking and Cloud Computing Application

2021 ◽  
Author(s):  
Ming-Han Zhuang ◽  
Teny Shih ◽  
David Lai ◽  
Yu-Po Wang
Keyword(s):  
High Speed ◽  
Data Access ◽  
Pulse Amplitude ◽  
Key Factors ◽  
Low Loss ◽  
Differential Signal ◽  
Common Coding ◽  
Coding Schemes ◽  
Present Generation ◽  
Channel Dependent

Abstract In the present generation, internet with instant data access brings up the demands of high speed Ethernet. Development of 400G Ethernet is currently underway. There are two common coding schemes: non-return-to-zero (NRZ) and pulse-amplitude modulation 4-Level (PAM4). Because NRZ needs signaling in higher Nyquist frequency, which results in higher channel dependent loss, PAM4 has become a popular solution. In this paper, we use 85 Ohm differential signal to explore a way to improve performance in the aspects of insertion loss, return loss and crosstalk for 112Gbps PAM4 application. A 12 layer substrate with low-loss dielectric of ABF-GL102 is used for the study. We scan the gap size of via pad which contributes the impedance discontinuity thus impacts signal integrity. Die bump and BGA pin assignments are the other two key factors in cause of crosstalk.

Low loss fibre transmission of high speed pulse signals at 1.29 μm wavelength

1978 ◽  
Vol 14 (6) ◽  
pp. 187 ◽  
Author(s):  
Masatoshi Saruwatari ◽  
Koichi Asatani ◽  
Jun-Ichi Yamada ◽  
Iwao Hatakeyama ◽  
Koichi Sugiyama ◽  
...  
Keyword(s):  
High Speed ◽  
Low Loss ◽  
Fibre Transmission

scholarly journals Ultracompact and low-power-consumption silicon thermo-optic switch for high-speed data

Nanophotonics ◽  
2020 ◽  
Vol 10 (2) ◽  
pp. 937-945
Author(s):  
Ruihuan Zhang ◽  
Yu He ◽  
Yong Zhang ◽  
Shaohua An ◽  
Qingming Zhu ◽  
...  
Keyword(s):  
Power Consumption ◽  
Low Power ◽  
High Speed ◽  
High Performance ◽  
Pulse Amplitude ◽  
Telecommunication Networks ◽  
Low Power Consumption ◽  
Power Efficient ◽  
High Speed Data ◽  
On Chip

AbstractUltracompact and low-power-consumption optical switches are desired for high-performance telecommunication networks and data centers. Here, we demonstrate an on-chip power-efficient 2 × 2 thermo-optic switch unit by using a suspended photonic crystal nanobeam structure. A submilliwatt switching power of 0.15 mW is obtained with a tuning efficiency of 7.71 nm/mW in a compact footprint of 60 μm × 16 μm. The bandwidth of the switch is properly designed for a four-level pulse amplitude modulation signal with a 124 Gb/s raw data rate. To the best of our knowledge, the proposed switch is the most power-efficient resonator-based thermo-optic switch unit with the highest tuning efficiency and data ever reported.

scholarly journals Graphene Nanoribbon Gap Waveguides for Dispersionless and Low-Loss Propagation with Deep-Subwavelength Confinement

Nanomaterials ◽  
2021 ◽  
Vol 11 (5) ◽  
pp. 1302
Author(s):  
Zhiyong Wu ◽  
Lei Zhang ◽  
Tingyin Ning ◽  
Hong Su ◽  
Irene Ling Li ◽  
...  
Keyword(s):  
High Performance ◽  
Chemical Potential ◽  
Shape Change ◽  
Optical Switch ◽  
Pulse Amplitude ◽  
Propagation Distance ◽  
Graphene Nanoribbon ◽  
Low Loss ◽  
High Loss ◽  
On Chip

Surface plasmon polaritons (SPPs) have been attracting considerable attention owing to their unique capabilities of manipulating light. However, the intractable dispersion and high loss are two major obstacles for attaining high-performance plasmonic devices. Here, a graphene nanoribbon gap waveguide (GNRGW) is proposed for guiding dispersionless gap SPPs (GSPPs) with deep-subwavelength confinement and low loss. An analytical model is developed to analyze the GSPPs, in which a reflection phase shift is employed to successfully deal with the influence caused by the boundaries of the graphene nanoribbon (GNR). It is demonstrated that a pulse with a 4 μm bandwidth and a 10 nm mode width can propagate in the linear passive system without waveform distortion, which is very robust against the shape change of the GNR. The decrease in the pulse amplitude is only 10% for a propagation distance of 1 μm. Furthermore, an array consisting of several GNRGWs is employed as a multichannel optical switch. When the separation is larger than 40 nm, each channel can be controlled independently by tuning the chemical potential of the corresponding GNR. The proposed GNRGW may raise great interest in studying dispersionless and low-loss nanophotonic devices, with potential applications in the distortionless transmission of nanoscale signals, electro-optic nanocircuits, and high-density on-chip communications.

scholarly journals Inverted p-down Design for High-Speed Photodetectors

Photonics ◽  
2021 ◽  
Vol 8 (2) ◽  
pp. 39
Author(s):  
Masahiro Nada ◽  
Fumito Nakajima ◽  
Toshihide Yoshimatsu ◽  
Yasuhiko Nakanishi ◽  
Atsushi Kanda ◽  
...  
Keyword(s):  
Amplitude Modulation ◽  
Optical Communications ◽  
High Speed ◽  
Pulse Amplitude ◽  
Avalanche Photodiode ◽  
Device Fabrication ◽  
Pulse Amplitude Modulation ◽  
Optical Coupling ◽  
Pin Photodiodes

We discuss the structural consideration of high-speed photodetectors used for optical communications, focusing on vertical illumination photodetectors suitable for device fabrication and optical coupling. We fabricate an avalanche photodiode that can handle 100-Gbit/s four-level pulse-amplitude modulation (50 Gbaud) signals, and pin photodiodes for 100-Gbaud operation; both are fabricated with our unique inverted p-side down (p-down) design.

Novel Manchester-Based Multilevel Signaling for High-Speed Optical Communication Systems

2019 ◽  
Vol 0 (0) ◽  
Author(s):  
Festus Idowu Oluwajobi ◽  
Nguyen Dong-Nhat ◽  
Amin Malekmohammadi
Keyword(s):  
Communication Systems ◽  
High Speed ◽  
Chromatic Dispersion ◽  
Optical Fiber Communication ◽  
Pulse Amplitude ◽  
Calculation Model ◽  
Fiber Communication ◽  
Receiver Sensitivity ◽  
Communication Links ◽  
Dispersion Tolerance

AbstractIn this paper, the performance of a novel multilevel signaling based on Manchester code namely four-level Manchester Coding (4-MC) technique is investigated for next generation high-speed optical fiber communication links. The performance of 4-MC is studied and compared with conventional Manchester modulation and four-level pulse amplitude modulation (4-PAM) formats in terms of receiver sensitivity, spectral efficiency and dispersion tolerance at the bit rate of 40 Gb/s. The bit error rate (BER) calculation model for the proposed multilevel scheme has also been developed. The calculated receiver sensitivity and the chromatic dispersion tolerance at the BER of 10–9 of the proposed scheme are −22 dBm and 67.5 ps/nm, respectively. It is observed that, 4-MC scheme is superior in comparison to 4-PAM by 3.5 dB in terms of receiver sensitivity in back-to-back scenario. Therefore, the proposed scheme can be considered as an alternative to current 4-PAM system.

A Cognitive Research Tendency in Data Management of Sensor Network

2021 ◽  
pp. 26-36
Author(s):  
Subhra Prosun Paul ◽  
◽  
Dr. Shruti Aggarwal ◽  
Keyword(s):  
Sensor Networks ◽  
Data Management ◽  
Sensor Network ◽  
High Speed ◽  
Web Of Science ◽  
Data Access ◽  
Global Perspective ◽  
Data Movement ◽  
Network Database ◽  
Cognitive Research

In today’s World sensor networks offer various opportunities for data management applications because of their low cost, reliability, scalability, high-speed data processing, and other versatile advantageous purposes. It is a great challenge to organize data effectively and to retrieve the appropriate data from the large volume of various data sets in ad-hoc network databases, mobile databases, etc. The sensor network is necessary for routing of data, performance analysis of data management activities, and data incorporation for the right application. Data management involves intranet and extranet query handling, data access mechanism, modeling of data, different data movement algorithm, data warehousing, and data mining of network database. Additionally, connectivity, design, and lifetime are important issues for sensor networks to perform all data management activities smoothly. In this paper, we are trying to give a cognitive research tendency of Sensor network data management in the last two decades considering all the challenges and issues of both sensor network database and data management functions using Scopus and Web of Science database. To analyze data, different assessments are done considering various parameters like the author, time, publication and citation number, place, source, document separately for Web of Science and Scopus database in global perspective. It is noticed that there is a significant growth of research in data management for sensor networks because of the popularity of this topic.

High‐Speed Pulse Amplitude Discriminator

1958 ◽  
Vol 29 (7) ◽  
pp. 595-596 ◽  
Author(s):  
F. J. M. Farley
Keyword(s):  
High Speed ◽  
Pulse Amplitude

A Novel Flux-Weakening Structure of High-Speed Permanent Magnet Motor Based on the Soft Ferrite

2013 ◽  
Vol 694-697 ◽  
pp. 1508-1511
Author(s):  
Xing Hua Wang ◽  
Xue Yuan Lin ◽  
Ming Hui Li ◽  
Yu Chen ◽  
Cheng Hui Zhang
Keyword(s):  
Permanent Magnet ◽  
High Speed ◽  
High Resistivity ◽  
Permanent Magnet Motor ◽  
Soft Magnetic ◽  
Low Loss ◽  
Magnetic Resistance ◽  
The Magnetic Field ◽  
Soft Ferrite ◽  
Flux Weakening

Soft ferrite has the characteristics of high permeability, high resistivity, low loss. Based on this, a new flux-weakening structure of high-speed permanent magnet motor was presented. The structure relies on changing the saturation of soft magnetic ferrite to change the equivalent magnetic resistance of permanent magnet magnetic circuit in the motor, so the main flux of the permanent magnet motor can be reduced. By the 3D Finite Element analyses, the magnetic field distribution characters in the air gap can be pointed out. The analysis results prove the flux-weakening method is presented in this paper is correct and feasible. It can provide a practical flux-weakening method of the high-speed PM motor.

scholarly journals CONTENTS AND SYSTEM OF EXPERT ACTIVITY IN THE FIELD OF COMPUTER TECHNOLOGIES: DEFINITION PROBLEMS

2019 ◽  
pp. 158-162
Author(s):  
S. M. Korniiko
Keyword(s):  
Information Technology ◽  
Information And Communication Technologies ◽  
Computer Technology ◽  
Information Search ◽  
High Speed ◽  
Human Life ◽  
General System ◽  
Data Access ◽  
Computer Technologies ◽  
Definition Of

The article is devoted to the definition of the content and the system of expert activity in the field of computer technologies, which is based on the results of determining the general system of expert activity. Expert activity should be understood as the implementation by authorized agents on the basis of special knowledge in the field of science, technology, art, crafts, etc. Studies of objects, phenomena and processes in order to provide scientifically substantiated conclusions on the diverse issues that arise in the process of life of society. Such a definition of expert activity includes both judicial and non-judicial expert examination. At present, more than 500 laws are adopted in Ukraine, which in one way or another concern the conduct of expert assessments (most of them are valid at 2019). But no any among that laws directly devoted to the expert work in the field of computer technology. So the system and content of the expert work in the field of computer technology should be established, based on knowledge of the object of expertise – computer technology. It is considered as synonymous with the concept of “information technology” or “information and communication technologies”. Information technology – it is a purposeful organized set of information processes using computer facilities, which provide high speed data processing, rapid information search, dispersal of data, access to information sources regardless of places of their location. The system of expert activity in the field of computer technologies includes examinations belonging to a group of judicial (engineering, commodity, forensic, etc.) and non-judicial (scientific and scientific and technical expertise; examination of issues of quality and conformity of goods (products) to certain requirements; examination of issues of information security; examination of issues of environmental impact and the environment of human life, etc.), as well as presented by different kindsand species examinations that have different goals focused on the study of computer technology in their various aspects and provides solutions to diverse issues.

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