Path computation for revenue optimization
- Hao F.
- Jansen A.
- Kodialam M.
- Lakshman T.
Leveraging centralized path computation algorithms can significantly improve routing efficiencies and revenue generation in existing IP/MPLS networks.
Sustainable Proof-of-Work Cryptocurrency Incentives
- Papadimitriou D.
- Pianese F.
- Sarkar S.
Abstract The design of a successful distributed system for enabling payments and micro-transactions among Internet users has long been a major challenge in applied computer science. Bitcoin, the first successful cryptocurrency, suffers from sustainability problems, such as inefficient energy expenditure for its network operation, and from perverse incentives that foster ...
Spectrum: A critical asset for 5G
- Dominique F.
Review of 5G impacts on Radio Spectrum, What it will look like, impacts on Spectrum usage and 5G Spectrum Needs
Quad Band Cube Multiband-Transceiver
- Haase C.
Poster for ALU Family Day 2014 in Nuremberg and Stuttgart
Virtualizing Network Services - Challenges and Trends
- Hilt V.
Presentation on key challenges and trends in the area of Network Function Virtualization. The talk gives a quick introduction to NFV, outlines key research challenges in the area and introduces our research results to improve the reliability and elasticity of NFV services. The technical content in these slides is based ...
Identification of the PoC scenarios
- Koppenborg J.
The proof-of-concepts (PoC) in FANTASTIC-5G target is to implement key technical components developed within the project. The demonstration aims at validating the feasibility and the superiority of the different components of the foreseen 5G air interface. For this activity, several platforms are being developed in FANTASTIC-5G. The planned demonstrations are ...
A National Space Weather Service.
- Killeen T.
- Lanzerotti L.
- Lotko W.
- Siscoe G.
There are strong economic and "quality of life" reasons for developing a full-service, state-of-the-science National Space Weather Service. At present the nation's space weather services, as their operators acknowledge, fall short of providing forecasts with the reliability, accuracy, and specificity that customers desire. The technological, scientific, and infrastructural resources exist, ...
Impact Ionization and Real-Space Transfer of Minority Carriers in Charge Injection Transistor.
- Canali C.
- Cho A.
- Luryi S.
- Manfredi M.
- Mastrapasqua M.
- Sivco D.
- Tedesco C.
- Zanoni E.
High electric fields in the channel of InGaAs/InAlAs heterostructure complementary charge injection transistor give rise to impact ionization and real-space transfer of minority holes from the channel. These phenomena are investigated by measuring light emission in the 1.1-3.1 eV energy range for different points on the electrical characteristics. The effective ...
16 Gb/s Fiber Transmission Experiment Using Optical Time-Division Multiplexing.
- Alferness R.
- Buhl L.
- Eisenstein G.
- Kasper B.
- Korotky S.
- Raybon G.
- Tucker R.
- Veselka J.
An experimental four-channel optical time-division multiplexed transmission system is described and the first demonstration of fiber transmission at a bit rate of 16 Gb/s is reported. In this experiment, data at 16 Gb/s has been transmitted over 8 km of fiber with a bit error rate below 10 sup (-9).
Reliability considerations for OLS holdover circuits.
- Kunzinger F.
Many applications require holdover of a power supply's output for 10 to 1000 milliseconds to bridge short input power line outages or dips. Capacitive energy storage is a common means of providing this holdover. This paper examines the reliability of a capacitive energy storage system under both operating and storage ...
Active mode-locking characteristics of InGaAsP-single-mode fiber composite-cavity lasers.
- Eisenstein G.
- Hall K.
- Jopson R.
- Koren U.
- Korotky S.
- Stulz L.
- Tucker R.
- Veselka J.
Composite-cavity semiconductor lasers using integral single- mode fiber resonators are capable of producing short-duration mode-locked optical pulses at very high repetition rates. This paper summarizes recent experiments using a composite- cavity structure with an efficient single-mode fiber output port. The dependence of pulse width on the electrical drive waveform and ...
Improved bandwidth of three channel buried crescent lasers.
- Bowers J.
- Eisenstein G.
- Gnauck A.
- Koren U.
- Tien P.
The modulation bandwidth of three-channel buried crescent (TCBC) lasers was improved by reducing the ohmic contact resistance by adding a quaternary contact layer for the P-contact of the device. The ohmic resistance was reduced to 6-9 ohms with capacitance of 1.5-3 pF and inductance of 1.5-2 nH. The small signal ...
IFS programmer's manual (release 2).
- Vo K.
The Interpretive Frame System (IFS) is a tool for creating application software with sophisticated interactive interfaces. IFS is based on the notion of a frame network. A frame network consists of many interconnected modules called frames, each of which represents a logical activity in the system. Frames are written in ...
PMOS TRANSISTORS FABRICATED IN LARGE AREA LASER CRYSTALLIZED SILICON IN SILICA.
- Bosch M.
- Harrison T.
- Herbst D.
- Lemons R.
- Tewksbury S.
PMOS transistors have been fabricated in device-worthy Si which was achieved by large-area laser-crystallisation of Si on silica. The crystallised Si contains few large-angle grain boundaries due to laser-beam inhomogeneity but exhibits subgrain boundaries aligned along the laser track. Cracking of the Si, a result of the mismatch of the ...
POLARIZATION PRESERVATION IN MULTIMODE FIBERS.
- Pleibel W.
- Stolen R.
- Wagner R.
Birefringent multimode fibres have been found to preserve polarisation except for one mode near cutoff. Experimental observations and theoretical considerations show that polarisation ratios better than 20 dB are possible, offering the potential for building polarisation-sensitive multimode fibre components.
HIGH-T(O) LOW-THRESHOLD CRESCENT INDIUM GALLIUM ARSENIDE PHOSPHIDE MESA-SUBSTRATE BH LASERS.
- Shtrikman H.
- Tamari N.
A crescent-shape mesa-substrate buried-heterostructure (CMSB) InGaAsP laser (ÃÂ¿ = 1.3 ÃÂ¿m) was grown by a single-step liquid phase epitaxy. Threshold current as low as 25 mA with 200 ÃÂ¿m cavity length under pulse operation and linear light/current characteristics up to five times Ith were obtained. T0 as high as 97ÃÂ°C ...
CW OPERATION OF A GALLIUM INDIUM ARSENIDE PHOSPHIDE/INDIUM PHOSPHIDE LASER WITH A CHEMICALLY-ETCHED MIRROR.
- Iga K.
- Miller B.
The first c.w. operation of a GaInAsP/InP stripe laser (ÃÂ¿ÃÂ¿1.3 ÃÂ¿m) having a chemically etched mirror has been achieved at room temperature. One of the cavity facets was monolithically formed by a wet chemical etch and passivated with a Si3N4 film to simplify bonding the chip on a heat sink. ...
LOW-LOSS SPLICES FOR SINGLE-MODE FIBERS.
- Derosier R.
- Tynes A.
A technique for producing low-loss splices in single-mode fibres has been developed and evaluated. The splices are made by sandwiching the fibre butt-joint ends between a glass V-groove block and a flat glass plate, both of which are made by fibre-drawing techniques. A new splice-loss measuring technique is described. The ...
PARTIAL DETECTION AND CORRECTION OF TRANSMISSION ERRORS FROM THE RECEIVED DATA IN LINEAR PCM.
- Esdale D.
- Goodman D.
- Steele R.
A method for partially correcting transmission errors in a 1st-order d.p.c.m. system, without recourse to channel coding, is described. A simple detection algorithm based on the statistical properties of a sequence of differences between adjacent samples of a modified decoded sequence is used to identify the erroneous samples. Three different ...
AN ACOUSTIC SURFACE WAVE ANALOG TO DIGITAL CONVERTER.
- Baldwin G.
- Coldren L.
An analogue-digital convertor that employs an acoustic-surface-wave transducer code plate is described. An experimental a.d. encoder with 4 bits of resolution and a 3 MHz sampling rate has been implemented with an LiNbO3 surface-wave structure.