KEYWORDS: Power consumption, Data transmission, Power supplies, Resistance, Photovoltaics, Analog to digital converters, Sensors, Semiconductor lasers, Microcontrollers, Fiber optics
This paper describes experiments on having organized power transmission over optical fibers (Powerover- Fiber, PWoF) for a seismoacoutic seafloor module, consisting of a three-component geophone and a hydrophone. The experimental setup includes a fiber-optic information and energy cable, a photovoltaic optical energy converter, and seismic sensors based on intermolecular electron transfer. It is shown that the efficiency of the conversion depends on the optical power incident on the converter and load connected to it, so that optimal conversion regimes of operation are found out. The results of field tests of the experimental setup in the White Sea are also presented.
In this work, we experimentally study the features of laser drilling of composite highly porous ceramics consisting of aluminosilicates, glass and a small addition of polystyrene (EPS). It was found that the formation of a liquid phase can contribute to the strengthening of ceramics. A list of factors that determine the dynamics of hole formation is proposed. These include not only the processes of heating, melting, ablation, and ejection, well known previously for metals and dense ceramics, but also a number of other specific processes: (a) boiling of the component of the mixture with the lowest temperature of thermal decomposition and its escape from the affected zone; (b) a melt of less volatile components; (c) sealing the ceramics adjacent to the walls due to the mechanical sealing effect of ablative pressure; (c) glass transition of the liquid phase upon cooling after the end of irradiation.
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