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We report recent advances in photonic–electronic integration developed in the European research project L3MATRIX. The aim of the project was to demonstrate the basic building blocks of a co-packaged optical system. Two-dimensional silicon photonics arrays with 64 modulators were fabricated. Novel modulation schemes based on slow light modulation were developed to assist in achieving an efficient performance of the module. Integration of DFB laser sources within each cell in the matrix was demonstrated as well using wafer bonding between the InP and SOI wafers. Improved semiconductor quantum dot MBE growth, characterization and gain stack designs were developed. Packaging of these 2D photonic arrays in a chiplet configuration was demonstrated using a vertical integration approach in which the optical interconnect matrix was flip-chip assembled on top of a CMOS mimic chip with 2D vertical fiber coupling. The optical chiplet was further assembled on a substrate to facilitate integration with the multi-chip module of the co-packaged system with a switch surrounded by several such optical chiplets. We summarize the features of the L3MATRIX co-package technology platform and its holistic toolbox of technologies to address the next generation of computing challenges.

This paper presents some properties of surface discharge currents due to air pressure influence on porcelain insulator specimen. The specimen was subjected by high voltage source in a hermetically sealed chamber, where the pressure could be adjusted and measured simultaneously. The applied voltage and discharge current waves were recorded by a storage digital oscilloscope, transferred and saved to a computer. The discharge current waves were analyzed using FFT. The result indicated that the discharge currents occurred in intermittent conditions. After the fundamental frequencies, the second highest amplitudes were third harmonics. These were different from leakage current as usual, which fifth harmonics were as second highest amplitudes. The discharge current amplitude would increase as the pressure reduced. In other word, the discharge breakdown voltage would increase as the air pressure increase. The discharge currents experienced a suppression on the front of waves. Almost harmonics have negative correlation coefficient to pressure, except THD, that has 0.45 of correlation coefficient to pressure.Keywordsair pressure, discharge current, harmonics porcelain specimen.

Articles you may be interested inInternal bias effects on pyroelectric measurements near the Curie temperature in triglycine sulphate An expression is derived for the pyroelectric (PE) voltage response to step radiation signals which can be applied up to temperatures close to the Curie point Tc under a "small-signal" condition. Based on the Curie-Weiss law and the thermodynamic theory of a second-order ferroelectric transition, a discussion is given of the temperature dependence of the parameters of the PE voltage response: initial slope, peak value, rise time, and fall time as functions of sample parameters and load resistance. It is found that the PE voltage may reach a maximum close to T c ' and expressions are derived for this value as well as for the temperature at which it occurs. These results were checked in detail on 12 samples of single-crystalline triglycine sulphate for temperatures from 20 'C to the Curie point, and good agreement between theory and experiment was observed. The application of the results to PE detection of ir is considered.