Telcordia Technologies

About: Telcordia Technologies is a based out in . It is known for research contribution in the topics: Network packet & Node (networking). The organization has 3097 authors who have published 4737 publications receiving 237882 citations.

Effect of the post‐deposition processing ambient on the preparation of superconducting YBa2Cu3O7−x coevaporated thin films using a BaF2 source

Abstract: We have investigated the effect of the post‐deposition processing ambient on the preparation of YBa2Cu3O7−x thin films from a BaF2 source. The role of H2O vapor during the high‐temperature anneal is understood through a thermodynamic analysis of the fluorine removal reaction. The role of a HF getter (e.g., SiO2) is understood through the same type of analysis. We have demonstrated that a zero resistance transition temperature at 77 K can be obtained for an annealing temperature as low as 690 °C for films deposited on SrTiO3 substrates by increasing the PH2O and decreasing PHF during the high‐temperature soak cycle.

Silica electrolyte element for secondary lithium battery

Abstract: A film of linear organosilsesquioxane polymer, or 'ladder' organosiloxane, coated upon the surface of an LiMn2O4 secondary battery electrode (19) and cured to a glassy layer is subjected to plasma oxidation to remove pendant organic groups comprising the coated polymer. The resulting ultrathin silica separator layer (17) is replete with minute pores which take up and retain by capillarity a typical LiC1O4 electrolyte solution. A counter-electrode (15) placed in intimate contact with the silica electrolyte element completes a secondary battery structure (10) in which lithium ions readily migrate through the electrolyte during repeated discharge/charge cycles without loss of element integrity or efficacy.

Broadband packet switch with combined queuing

Abstract: A novel packet switch architecture is disclosed. The packet switch utilizes internal queuing (i.e. recirculation loops) and output queuing (i.e. multiple paths to each destination) to provide a packet switch which offers superior performance in comparison to a packet switch which utilizes either of these queuing strategies alone. The combination of recirculation and output queues have complimentary effects. The output queuing reduces the number of recirculation loops needed and recirculation reduces the bandwidth requirements for an output buffered switch.

Congestion management based on multiple framing strategy

Abstract: A congestion control strategy for a packet switching network (10) comprises an admission policy which controls the admission of packets into the network (10) and a stop-and-go queuing strategy (50) at the network nodes (n'''). The congestion control strategy utilizes multiple frame sizes (Fig. 6A) so that certain types of connections can be provided with small queuing delays while other types of connections can be allocated bandwith using small incremmental bandwidth units.

Applications of Artificial Neural Networks in Optical Performance Monitoring

Abstract: Applications using artificial neural networks (ANNs) for optical performance monitoring (OPM) are proposed and demonstrated. Simultaneous identification of optical signal-to-noise-ratio (OSNR), chromatic dispersion (CD), and polarization-mode-dispersion (PMD) from eye-diagram parameters is shown via simulation in both 40 Gb/s on-off keying (OOK) and differential phase-shift-keying (DPSK) systems. Experimental verification is performed to simultaneously identify OSNR and CD. We then extend this technique to simultaneously identify accumulated fiber nonlinearity, OSNR, CD, and PMD from eye-diagram and eye-histogram parameters in a 3-channel 40 Gb/s DPSK wavelength-division multiplexing (WDM) system. Furthermore, we propose using this ANN approach to monitor impairment causing changes from a baseline. Simultaneous identification of accumulated fiber nonlinearity, OSNR, CD, and PMD causing changes from a baseline by use of the eye-diagram and eye-histogram parameters is obtained and high correlation coefficients are achieved with various baselines. Finally, the ANNs are also shown for simultaneous identification of in-phase/quadrature (I/Q) data misalignment and data/carver misalignment in return-to-zero differential quadrature phase shift keying (RZ-DQPSK) transmitters.