A.F. Kriachko1, N.I. Belyakov2, A.I. Tyurina3

1–3 St. Petersburg State University of Aerospace Instrumentation (SUAI) (St. Petersburg, Russia)

Increase in the number of users of infocommunication systems due to the expansion of Internet access from mobile devices, increasing popularity of providing online information services, growth of multimedia traffic requires increasing network performance and bandwidth. Bandwidth and performance of modern infocommunication systems is determined by the speed of microelectronics and optoelectronics element base, as well as the capabilities of switches, multiplexers, demultiplexers. It is known that physical speed limits of microelectronics element base are determined by the time of electrons' flight, and decrease of element sizes is limited by technological capabilities of their production. There are also physical limits to microelement size reduction, with significant limitations imposed by their power consumption and heat dissipation. Channel wavelength multiplexing systems are evolving rapidly and continue to evolve into optical systems with wavelength routing and switching capabilities.

Analysis of the development of infocommunication systems has shown that to improve their speed and capacity it is necessary to improve the element base of devices using nanoscale structures, to move to the use of fully optical networks in which the light signal is transmitted from one network device to another without intermediate conversions to electrical form. The aim is to develop nanoscale structures on surface plasmons to improve the speed and capacity of infocommunication systems.

Further improvement of noise immunity is possible through the use of broadband fractal signals. The mathematical model of process of surface plasmon polariton wave propagation along the boundary between metal and dielectric in plasmonic waveguides of different configuration that takes into account thickness of metal film in case it has 2D structure and that allowed experimental research of influence of geometrical dimensions, bending angles of waveguides on intensity and path of plasmonic wave propagation has been further developed.

The results can be used to create new types of signal processing, transmission and switching devices suitable for operation in the terahertz range, as well as within the framework of solving problems of interconnection of electronics and photonics devices in integrated circuits.

Kriachko A.F., Belyakov N.I., Tyurina A.I. Electrodynamic model of an optical multiplexer. Achievements of modern radioelectronics. 2023. V. 77. № 8. P. 58–65. DOI: https://doi.org/10.18127/j20700784-202308-08 [in Russian]

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