Multiplier and Harmonic Generator Technologies for Terahertz Applications

2003 ◽  
Vol 13 (02) ◽  
pp. 429-456 ◽  
Author(s):  
R. M. Weikle ◽  
T. W. Crowe ◽  
E. L. Kollberg
Keyword(s):  
Harmonic Generation ◽  
Integrated Circuit ◽  
Frequency Multiplier ◽  
Technological Innovations ◽  
Frequency Multipliers ◽  
New Device ◽  
Harmonic Generator ◽  
Submillimeter Wavelengths ◽  
Successful Approach ◽  
Processing Techniques

Harmonic generation based on frequency multipliers has proven to be the most successful and widely used solid-state technology for generating power at submillimeter wavelengths. Over the last several years, the development of new device technologies, implementation of innovative circuits, and application of advanced integrated-circuit processing techniques to frequency multiplier design have resulted in unprecedented levels of performance throughout the submillimeter-wave frequency band. This paper reviews the technological innovations, device options, circuit architectures, and fabrication technologies that have made harmonic generation such a successful approach to source development in the submillimeter spectrum.

Ochrona dziedzictwa kulturowego a działania na dużych szybkozmiennych zbiorach danych – perspektywa kryminologiczna

2019 ◽  
pp. 5-22
Author(s):  
Szymon Buczyński
Keyword(s):  
New Technology ◽  
Big Data Analytics ◽  
Technological Innovations ◽  
Cultural Organizations ◽  
Econometric Methods ◽  
The Arts ◽  
Huge Data ◽  
Wide Range ◽  
Share Data ◽  
Processing Techniques

Recent technological revolutions in data and communication systemsenable us to generate and share data much faster than ever before. Sophisticated data tools aim to improve knowledge and boost confdence. That technological tools will only get better and user-friendlier over the years, big datacan be considered an important tool for the arts and culture sector. Statistical analysis, econometric methods or data mining techniques could pave theway towards better understanding of the mechanisms occurring on the artmarket. Moreover crime reduction and prevention challenges in today’sworld are becoming increasingly complex and are in need of a new techniquethat can handle the vast amount of information that is being generated. Thisarticle provides an examination of a wide range of new technological innovations (IT) that have applications in the areas of culture preservation andheritage protection. The author provides a description of recent technological innovations, summarize the available research on the extent of adoptionon selected examples, and then review the available research on the eachform of new technology. Furthermore the aim of this paper is to explore anddiscuss how big data analytics affect innovation and value creation in cultural organizations and shape consumer behavior in cultural heritage, arts andcultural industries. This paper discusses also the likely impact of big dataanalytics on criminological research and theory. Digital criminology supports huge data base in opposition to conventional data processing techniques which are not only in suffcient but also out dated. This paper aims atclosing a gap in the academic literature showing the contribution of a bigdata approach in cultural economics, policy and management both froma theoretical and practice-based perspective. This work is also a startingpoint for further research.

Design and Simulation of Pressure Sensor for Ocean Depth Measurements

2013 ◽  
Vol 313-314 ◽  
pp. 666-670 ◽  
Author(s):  
K.J. Suja ◽  
Bhanu Pratap Chaudhary ◽  
Rama Komaragiri
Keyword(s):  
Pressure Sensor ◽  
Integrated Circuit ◽  
Output Voltage ◽  
Pressure Sensors ◽  
Micro Electro Mechanical System ◽  
Constant Thickness ◽  
Piezoresistive Pressure Sensor ◽  
Wide Pressure Range ◽  
Processing Techniques ◽  
Wide Pressure

MEMS (Micro Electro Mechanical System) are usually defined as highly miniaturized devices combining both electrical and mechanical components that are fabricated using integrated circuit batch processing techniques. Pressure sensors are usually manufactured using square or circular diaphragms of constant thickness in the order of few microns. In this work, a comparison between circular diaphragm and square diaphragm indicates that square diaphragm has better perspectives. A new method for designing diaphragm of the Piezoresistive pressure sensor for linearity over a wide pressure range (approximately double) is designed, simulated and compared with existing single diaphragm design with respect to diaphragm deflection and sensor output voltage.

Hardware Efficient Hybrid Encoder for Video Surveillance Application

2020 ◽  
pp. 2150113
Author(s):  
Minesh Patel ◽  
Anand Darji
Keyword(s):  
Video Surveillance ◽  
Integrated Circuit ◽  
Video Processing ◽  
Signal To Noise Ratio ◽  
Scalable Video Coding ◽  
Video Codec ◽  
Available Bandwidth ◽  
Coding Efficiency ◽  
Cell Library ◽  
Processing Techniques

Extensive use of digital multimedia has led to the development of advance video processing techniques for development of multimedia applications. Application such as video surveillance requires 247 recording and streaming. So, the bandwidth and storage costs become significant. With introduction of video streaming over internet, where different kinds of end users request same content with different available bandwidth, it requires scalable video coding (SVC). These challenges can be overcome by developing new techniques to reduce redundancy in subsequent frames and to improve the coding efficiency. In this paper, overlapping weighted linear sum (OWLS) pre-processing method and its hardware architecture are proposed. It is implemented using field progrmmable gate array (FPGA) and the application specific integrated circuit (ASIC) is also developed using TSMC180nm technology standard cell library. Results show improvement in terms of power and area as compared to the existing work. In motion compensated temporal filtering (MCTF), wavelet transform is implemented by temporal filters. Architecture for 5/3 Lifting MCTF is also implemented and compared with baseline H.264 video codec. Simulation results show that the average peak signal to noise ratio (PSNR) improvement is 2.36[Formula: see text]dB. The MCTF design using 5/3 Lifting filter is synthesized for Virtex-5 FPGA and compared with the existing close-loop architecture with better performance.

The Contribution of Beam Processing to Present and Future Integrated Circuit Technologies

1983 ◽  
Vol 13 ◽  
Author(s):  
C Hill
Keyword(s):  
Pulse Laser ◽  
Present State ◽  
Integrated Circuit ◽  
Bipolar Transistor ◽  
Device Development ◽  
Processing Techniques ◽  
Doping Profiles ◽  
Controlled Doping ◽  
Circuit Technology ◽  
Base Structure

ABSTRACTA brief history and present state of beam processing techniques and applications to silicon integrated circuit technology are given. The viability of incorporating pulse-laser controlled doping profiles into the emitter-base structure of an advanced bipolar transistor is discussed. The areas of present I.C. technology which will constrain future device development are identified, and the contribution that beam processing can make in removing these constraints is discussed. The beam processing techniques most likely to be found in future I.C. technologies are described.

Investigation of the Characteristic of the Nd:YAG Laser for Standard Wavelength in Metrology

2013 ◽  
Vol 770 ◽  
pp. 398-401
Author(s):  
Prayut Potirak ◽  
Monludee Ranusawud ◽  
Pichet Limsuwan ◽  
Prathan Buranasiri
Keyword(s):  
Second Harmonic Generation ◽  
Diode Laser ◽  
Harmonic Generation ◽  
Nd:Yag Laser ◽  
Laser Power ◽  
Second Harmonic ◽  
Harmonic Generator ◽  
Second Harmonic Generator ◽  
532 Nm ◽  
Nd:Yag Crystal

This research studied characteristics of the Nd:YAG laser with second harmonic generation (SHG) at 532 nm. It can be develop as a standard wavelength according to the recommendation made by the Comite International des Poids et Measures (CIPM). This study investigates various parameters that effect wavelength and laser power of the Nd:YAG laser such as injection current of diode laser, temperature of Nd:YAG crystal and second harmonic generator crystal. Its wavelength can be tuned in the range of standard wavelength at 532.24503 nm with 10-7 of stability.

scholarly journals Efficient forward second-harmonic generation from planar archimedean nanospirals

Nanophotonics ◽  
2015 ◽  
Vol 4 (1) ◽  
pp. 108-113 ◽  
Author(s):  
Roderick B. Davidson II ◽  
Jed I. Ziegler ◽  
Guillermo Vargas ◽  
Sergey M. Avanesyan ◽  
Yu Gong ◽  
...  
Keyword(s):  
Second Harmonic Generation ◽  
Harmonic Generation ◽  
Second Harmonic ◽  
Average Power ◽  
Two Dimensional ◽  
Harmonic Generator ◽  
Left Handed ◽  
Planar Arrays ◽  
Power Loading ◽  
Axis Of Symmetry

Abstract:The enhanced electric field at plasmonic resonances in nanoscale antennas can lead to efficient harmonic generation, especially when the plasmonic geometry is asymmetric on either inter-particle or intra-particle levels. The planar Archimedean nanospiral offers a unique geometrical asymmetry for second-harmonic generation (SHG) because the SHG results neither from arranging centrosymmetric nanoparticles in asymmetric groupings, nor from non-centrosymmetric nanoparticles that retain a local axis of symmetry. Here, we report forward SHG from planar arrays of Archimedean nanospirals using 15 fs pulses from a Ti:sapphire oscillator tuned to 800 nm wavelength. The measured harmonic-generation efficiencies are 2.6·10−9, 8·10−9 and 1.3·10−8 for left-handed circular, linear, and right-handed circular polarizations, respectively. The uncoated nanospirals are stable under average power loading of as much as 300 μWper nanoparticle. The nanospirals also exhibit selective conversion between polarization states. These experiments show that the intrinsic asymmetry of the nanospirals results in a highly efficient, two-dimensional harmonic generator that can be incorporated into metasurface optics.

Up Close: MIT's Ceramics Manufacturing and Process Integration Laboratory

MRS Bulletin ◽  
1987 ◽  
Vol 12 (7) ◽  
pp. 91-94
Author(s):  
Richard L. Pober ◽  
Elizabeth A. Thomson
Keyword(s):  
Integrated Circuit ◽  
Manufacturing Systems ◽  
New Technologies ◽  
Process Integration ◽  
Basic Research ◽  
Massachusetts Institute Of Technology ◽  
Short Period ◽  
Manufacturing Productivity ◽  
Institute Of Technology ◽  
Processing Techniques

In a relatively short period of time ceramics have become the key elements to a variety of new technologies, including integrated circuit substrates, artificial limbs, turbocharger rotors, and, of course, superconductors. By and large, however, they have not met their potential. Though advances in basic research are responsible for the breakthroughs so far, no extensive work has been done to establish the manufacturing paradigms necessary for the production of reliable, reproducible materials.The new Ceramics Manufacturing and Process Integration Laboratory (CMPIL) at the Massachusetts Institute of Technology was conceived to address this need. As a logical extension of the science-based Ceramics Processing Research Laboratory (CPRL), also at MIT, the CMPIL will “test” fundamental ideas as they relate to ceramics manufacturing. The goal is to create a hands-on “research factory,” complete with manufactured product, to make an impact on manufacturing productivity and teach students, staff, and visiting scientists the principles that control ceramics manufacturing systems. Other thrusts include developing innovative processing techniques and collecting operating data that will ultimately be transferred to industry.

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