Geophysical research: article

А.N. Antonov 1 S.V. Golovin 1 R.M. Markov 1 I.V. Melnikov 1,2 E.R. Nadezhdin 1 А.V. Nejeshpapa 1 V.A. Sokolov 1 S.A. Tikhotsky 1,3
1 Moscow Institute of Physics and Technology National Research University, 2 M.A. Sadovsky Institute of Geosphere Dynamics of the Russian Academy of Sciences 3 Schmidt Institute of Physics of the Earth, Russian Academy of Sciences
Journal: Geophysical research
Tome: 23
Number: 4
Year: 2022
Pages: 55-72
UDK: 550.84.087:682.327.11
DOI: 10.21455/gr2022.4-4
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Keywords: power-over-fiber, seismic registration systems, seismic survey, seismic monitoring, molecular electronic transducer, photovoltaics.
Аnnotation: The experience of organizing the power supply of a seismoacoustic recording module consisting of a three–component geophone and a hydrophone by means of power transmission technology over optical fibers PWoF (Power-over-Fiber) is described. This technology has a number of advantages over traditional power supply with metal wires, which make it very convenient to use when creating seismic recording systems for geological exploration and seismic monitoring. These are: light weight, corrosion resistance, absence of reverse currents, immunity to electromagnetic interference, including spark discharge. A seismic recording system using this technology can be installed for surveying and monitoring for a very long time – up to tens of years, without the danger of a short circuit on the conductive lines, and without electromagnetic interference that can complicate the operation of the equipment. An experimental setup is described, including an information and energy fiber optics cable, a photovoltaic optical energy converter, as well as seismic sensors based on intermolecular electron transfer. The efficiency coefficients of the power supply channel in the modes of constant and variable load are determined, the temperature regime of the system elements is studied. It is shown that the efficiency depends on the optical power incident on the converter and the load connected to it. This opens up ways to optimize efficiency by varying these parameters. The results of field tests of an experimental installation in the waters of the White Sea are described. Thus, the possibility of power supply of elements of seismic registration systems via fiber-optic cable with photovoltaic energy conversion is practically proved. At the same time, optimal conversion modes are found in terms of achieving the maximum efficiency of radiation conversion.
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