ElAr :: Перегляд за автором "Kurskoy, Yu. S."

Перегляд за автором "Kurskoy, Yu. S."

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A human as a research object for metrology of nonlinear dynamic systems
(2017) Machekhin, Yu. P.; Kurskoy, Yu. S.; Prisich, E. Yu.
The article presents the results of practical using of the approaches and tools of Metrology of nonlinear dynamic systems (Nonlinear Metrology). They were used for measurement and analysis of dynamic variables of a human body with a regular physical activity. As the analysis tools the intervals of dynamic variables values, measurement portrait, fractal dimension and Shannon entropy are used. The analysis of measurements results demonstrates that the dynamics of measured value is close to deterministic way. This is a characteristic trait of an open system with a self-organization function. The study results can be used for development of athletes training programs.
Application of Supercontinuum in Optical Gyroscopy
(Sumy State University, 2023) Kurskoy, Yu. S.; Hnatenko, O. S.; Afanasieva, O. V.
Робота присвячена вивченню проблеми використання лазерного випромінювання в режимі суперконтинууму у волоконно-оптичних гіроскопах. Для досягнення поставленої мети в роботі вирішувалися наступні завдання: описано фізику процесу вимірювання кутової швидкості об'єкта на основі ефекту Саньяка; проаналізовано фактори, що впливають на роздільну здатність гіроскопа. Ці фактори включають частковий шум, неминучий шум і шум через зворотне розсіювання у волокні, який можна мінімізувати за допомогою фотонно-кристалічних волокон і широкосмугового джерела випромінювання. В якості такого джерела пропонується використовувати оптичний суперконтинуум (оптичну гребінку). Завдяки надширокому спектру випромінювання, точності відтворення частоти, високій стабільності випромінювання та фемтосекундній тривалості імпульсу суперконтинуум вважається перспективним джерелом випромінювання в гіперспектральній спектроскопії та зображенні, томографії та інтерферометрії білого світла з низькою когерентністю. Проведено аналіз можливості використання оптичної гребінки в оптичній гіроскопії. Проведено математичне моделювання впливу характеристик оптичного волокна та параметрів суперконтинууму на чутливість волоконного гіроскопа. Результати роботи свідчать про перспективність подальших досліджень зі створення фотонно-кристалічного волоконно-оптичного гіроскопа з використанням лазерного випромінювання суперконтинууму. The work is devoted to the study of the problem of using laser radiation in the supercontinuum mode in fiber optical gyroscopes. To achieve this goal, the following tasks were solved in the work. The physics of the process of measuring the angular velocity of an object based on the Sagnac effect is described. The factors influencing the resolution of the gyroscope are analyzed. These factors include fractional noise, unavoidable noise, and noise due to backscatter in the fiber, which can be minimized by using photonic crystal fibers and a broadband radiation source. It is proposed to use an optical supercontinuum (optical comb) as such a source. Thanks to its ultra-wide radiation spectrum, precision frequency reproduction accuracy, high radiation stability and femtosecond pulse duration, supercontinuum is considered as a promising radiation source in ranging, hyperspectral spectroscopy and imaging, tomography, and low-coherence white light interferometry. In the work of Lpischan, the physics of the supercontinuum generation process, its main characteristics. An analysis of the possibility of using an optical comb in optical gyroscopy has been carried out. Mathematical modeling of the influence of optical fiber characteristics and supercontinuum parameters on the sensitivity of a fiber gyroscope was carried out. The results of the work indicate the promise of further research on the creation of a photonic crystal fiber-optic gyroscope using supercontinuum laser radiation.
Expression of uncertainty in measurement of nonlinear dynamic variables
(ХНУРЭ, 2017) Machekhin, Yu. P.; Kurskoy, Yu. S.
We show a way for estimation and expression of uncertainty in measurement of nonlinear dynamic variables. The measurement results are represented by number of interval variables with not canonical distribution lows. Each interval is represented by the minimum and maximum values of dynamic variables with their measurement uncertainties. Within the intervals the dynamical variables are displayed by the histograms of measurement results values. The most and least probable values of dynamic variables with their uncertainties and probabilities are presented too. The measurement results are added with the fractal dimension, Shannon entropy and forecasting horizon time. The described set of measurement results is a measurement portrait
Features of entropy analysis of measurement results in nonlinear dynamical systems
(Метрологія та прилади, Харьков, 2013) Machekhin, Yu. P.; Kurskoy, Yu. S.
This article is the first from the group of publications about new metrological tasks. The article contains the arguments for using entropy analysis during creation new specific approaches and models for measurements in real-world nonlinear dynamical systems. The presenters offer special measurement model and measurement results analysis model that based on the main principles and concepts of dynamical chaos theory and fractal representations of the real systems behavior. The example of entropy analysis of measurement results in nonlinear dynamical systems is represented. It is shown that using entropy analysis will allow to use the modified Concept of expression of uncertainty of measurements in real-world, open, dissipative, chaotic systems.
Laser anemometry method for particle velocity measurement in the bose-Einstein condensate
(Begell House, 2018) Machekhin, Yu. P.; Kurskoy, Yu. S.; Gnatenko, A. S.
Studying of physical and engineering conditions of the process of atom velocity measurement in Bose-Einstein condensate is performed in the paper. In order to provide for the metrological support of the particle laser cooling process it is suggested the laser anemometry method based on measuring the Doppler frequency shift due to scattering of laser radiation by the moving particles to be cooled. The laser anemometry method for estimation of the particle velocity during the particle laser cooling process and the interferential model of the laser Doppler anemometry are provided. The requirements set to technical specifications of the laser Doppler anemometer are determined. The results of the paper form the basis of providing for the metrological support of the particle laser cooling process performed in order to create new frequency standards, the Bose-Einstein condensate and the quantum memory.
Laser marking system for plastic products
(2019) Kurskoy, Yu. S.; Zarytskyi, V. I.; Cherkashin, A. I.; Gulak, S. V.; Balashov, I.; Zhdanova, Yu. V.
This research paper solves the challenge of plastic product marking. In particular, plastic cap marking. Nowadays, IR lasers (fiber, solid-state, gas lasers) are used for plastic marking, in most cases these are 1.06 μm fiber lasers, but plastics must contain metal additives for obtaining a highquality marking with such a laser. And those additives are not safe for plastic products in the food industry. This problem is solved by using high-energy UV lasers. Therefore, the NII Laser Technology PJSC team has developed and produced a comprehensive system for high-resolution marking of both plastic products and other materials (metal, glass, ceramics) based on an ultraviolet laser. A combination of 2D-scanning technology, adaptive focusing, marking of objects in motion (on-the-fly), as well as a number of other technological and design solutions in this system made it possible to start production of conveyor lines for dynamic marking of beverage closures, crown caps, elongated plastic and metal caps amongst others that are used in the food industry. In comparison to the existing marking technologies, the developed laser marking comprehensive system provides high-speed (up to 100 thousand caps per hour) marking with text, digital and graphic data on the outer surfaces of the plastic produced without any special coloring agents, and allows getting a contrast image by using gray shading regardless of the surface color. At the present day, NII Laser Technology PJSC has carried out work to expand the capabilities of the laser marking comprehensive systems through the introduction of 3D scanning technology and the use of two band laser systems, that increase the product protection. The safety of using ultraviolet radiation for marking the internal surfaces of food packaging plastic elements is confirmed by the certificate on laboratory testing by INSTITUT NEHRING GmbH - Heesfeld 17-38,112 Braunschweig
Nanolaser superradiation in information and measuring procedures
(Begell House, 2018) Machekhin, Yu. P.; Kurskoy, Yu. S.; Gnatenko, A. S.; Tkachenko, V. A.
The subject of the paper is superradiance of nanolasers and its process of quantum dot formation, increased concentration of non-equilibrium charge carriers, as well as physical principles of nanolasers operation with superradiance in telecommunication systems. The objective of the paper is to substantiate the possibility of using nanoscale lasers in the superradiance mode and the devices on their basis to solve problems of transmission of high- speed optical information signals and tasks of the radiation frequency stabilization. Review of several types of nanolasers is performed. It is determined that despite the creation of a number of designs, a general theory of stabilizing the parameters of nanolaser radiation is not developed. It is a deterrent to the development of this type of lasers and their practical application. To use nanolasers in information-measuring procedures, the problems of stabilizing the radiation frequency, obtaining pulses of a predetermined duration (of the femtosecond order), and the peak power must be solved. To provide pulsed radiation with the necessary parameters, the authors propose to use the superradiance mode previously discovered in semiconductor heterostructures and expressed in a sharp increase in the radiation power. The analysis of the conditions for the formation of superradiance in the domain structure of semiconductors is based on the theoretical model for describing the concentration of non- equilibrium carriers (electrons and holes) in the active region of the laser. The process of occurrence of superradiance in nanolasers and the possibility of using this effect are considered. It is proved that high-power femtosecond pulses are formed in nanolasers with superradiance. The results of the carry out studies substantiate the possibility and prospect of using nanolasers in the mode of superradiance and the devices on their basis for transmission of high-speed optic information signals, creation of new optical frequency standards and photonics devices. Their application will contribute to the development of nanometrology, nanotechnology, information and other technologies. Calculations are performed to prove that in the superradiance mode, nanolasers generate the femtosecond pulses with a power of 10.9 μW, which allows the signal to be transmitted along the optic fiber to the distance of 750 m. In the future, works are planned to increase the power of such lasers to transmit information for the longer distances.
New Technologies of Laser Hardening of Parts of Fuel Equipment
(Sumy State University, 2023) Hnatenko, O. S.; Afanasieva, O. V.; Lalazarova, N. O.; Kurskoy, Yu. S.; Odarenko, E. N.; Sashkova, Y. V.; Ivanchenko, O. V.
Laser thermal hardening of steel (laser hardening) consists in heating a section of the steel surface above the phase transition temperature by laser radiation, followed by rapid cooling due to heat removal. As a result of this treatment, martensite is formed – a saturated solid carbon solution in α-iron. For laser hardening, gas CO2 lasers, solid-state (mainly Nd:YAG) and fiber lasers with a power of 0.5 kW or more are most often used. Optical systems for deploying and scanning the beam allow you to harden large areas of the surface with maximum efficiency. Not all products need processing of significant areas. Measuring and cutting tools, parts of fuel equipment, pump injectors are subject to significant abrasive wear of individual small areas. Less powerful lasers can be used to process them. There are no results of using low power pulsed lasers (up to 20 W) for surface hardening of steel products. The purpose of this work is to determine the modes of surface hardening of parts and tools made of carbon and alloy steels using low power pulsed solid-state YAG lasers. For laser hardening, a solid-state YAG laser with a power of 5 W (diode pumping, radiation wavelength = 1.064 µm, pulsed mode) was used. The use of a nonlinear crystal made it possible to obtain UV radiation from λ = 0.355 µm (third harmonic). Processing with single pulses and multi-pulse processing with short pulses were investigated. Thermal hardening was carried out on carbon and alloy steels of various compositions: 20, 45, У12, Р6M5, Р9, ШХ15, structural and tool steels for the purpose. The possibility of hardening by UV radiation was evaluated on steels 20, 45, У12 and ЩХ15. The efficiency of laser thermal hardening was evaluated by measuring microhardness. For surface hardening of products, where partial melting of the surface is possible, low-power pulsed lasers can be used. Laser hardening by UV radiation is a promising direction for thermal hardening of steels without surface melting. Hardening with a low-power laser is expedient for hardening parts of fuel equipment.
Optical system recognition via topological methods
(SPIE, 2020) Kurskoy, Yu. S.; Hnatenko, O. S.; Machekhin, Yu. P.; Neofitnyi, M. V.; Zarytskyi, V. I.
The aim of the paper is to create a topological model for the detection and recognition of hidden optical surveillance systems. The model is based on fractal insights about the structure of the optical signal and determination of the fractal dimension intensity distribution in a cross-sectional plane of the laser pulse reflected from the target. It is shown that the approximation of the fractal dimension value to unity is a prerequisite to the target classification as an optical surveillance device. In order to classify the type of an optical device along with the fractal dimension the group of the fractal characteristics, consisting of the type of fractal signatures, the type of spatial spectrum and the values of spatial frequency that characterize the signal structure must be developed.
Photonic crystal nanolasers as optical frequency standards
(Begell House, 2018) Machekhin, Yu. P.; Gnatenko, A. S.; Kurskoy, Yu. S.
Using of the nanolasers with the system of radiation frequency stabilization for development of the nano-size order optical frequency standards is considered in this paper. A number of nanolaser designs, their radiation processes and frequency stabilization are examined. The quantum dot nanolaser model with the wavelength of λ = 633 nm is developed. Radiation frequency stabilization is performed with the help of the iodine molecules placed into the photonic crystal cell having the T-shaped defect.
Physical and mathematical foundations of measurements in nonlinear dynamic systems
(Begell House, 2018) Machekhin, Yu. P.; Kurskoy, Yu. S.; Gnatenko, A. S.
Physical and mathematical bases of measurements in physical non-linear dynamical systems are formulated. Physical properties, common to different systems, include: interval physical values; different modes of dynamics (including chaotic); strong dependence on the initial conditions; exposure to noise. We have used mathematical tools and methods of the dynamic chaos theory, open systems theory, fractal analysis: intervals of quantities values, fractal dimension, predictability time, model equation and others. New results and models are important for creating lasers with high stabilization of characteristics and practical application of solitons.
Precision Synchronization of Chaotic Optical Systems
(CумДУ, 2021) Kurskoy, Yu. S.; Hnatenko, O. S.; Afanasieva, O. V.
The ideas of this article develop the technologies for synchronization of chaotic information systems components and parameters. Such systems hide information by embedding data into a chaotic carrier signal. Precision chaotic synchronization requires the correct measurement and analysis of chaotic dynamic variables. A model for estimating the degree of synchronization of chaotic laser modes is proposed. The model is based on the principles and methods of nonlinear chaotic values measurement. It provides the measurement and analysis of chaotic variables, the formation of measurement portrait that represents the states and dynamics of the system, and completes the methods for estimating the chaos degree, radiation parameters stability, and degree of synchronization of dynamic variables. A scheme for studying and controlling the chaotic dynamics of pulsed lasers, which includes a laser, a pulsed energy meter, a spectrum analyzer, a pulse frequency measurement unit, and a system for control, synchronization and recording measurement results is proposed. The divergence criteria for the dynamic variables’ values, fractal dimensions, measurement phase? portraits are offered for evaluation of synchronization. The equation that connects the fractal dimension and system parameters stability is obtained. It can be used for control of chaotic information systems components and parameters dynamics.
Ring fiber lasers for telecommunication systems
(Begell House, 2018) Gnatenko, A. S.; Machekhin, Yu. P.; Kurskoy, Yu. S.; Obozna, V. P.; Vasianovych, A. V.
The goal of this research is to study the interactions between a laser radiation and a liquidcrystal cell and to ensure the mode-locking in a ring fiber laser. In this paper we discuss how a non-linear polarization rotation in ring fiber lasers can be used to achieve the mode-locking. By supplying voltage to a liquid-crystal cell, we studied the polarization behavior both in theory and through experiment. Optical circuit of the ring fiber laser has been suggested.
System for recognition of optical tools,based on fractal mathematic views
(2021) Kurskoy, Yu. S.; Hnatenko, O. S.
The aim of the paper is to create a fractal model for detection and recognition of optical systems. The model is based on fractal insights about the structure of the optical signal and determination of the fractal dimension intensity distribution in a cross-sectional plane of the laser pulse reflected from the target. It is shown that the approximation of the fractal di-mension value to unity is a prerequisite to the target classification as an optical surveillance device. In order to classify the type of an optical device along with the fractal dimension the group of the fractal characteristics, consisting of the type of fractal signatures, the type of spatial spectrum and the values of spatial frequency that characterize the signal structure must be developed.
The Development of Nonlinear Metrology Methods
(2015) Machekhin, Yu. P.; Kurskoy, Yu. S.
The article contains the results of research in a new perspective sphere of nonlinear metrology. The special measurement model and measurement results analysis model, that based on the main principles and concepts of dynamical chaos theory and fractal representations of the real systems behavior, are offered in the frame of nonlinear metrology theory. The model of human health measurement is represented here. It has the numerical portrait, entropy and time lines for evaluation of human health condition. It can be used for assess the state of human health during a treatment or an athletic training.
The Evaluation of Cooled Particles’ Parameters by Instruments of Nonlinear Metrology
(ВКФ «Фавор ЛТД», 2015) Machekhin, Yu. P.; Kurskoy, Yu. S.
In the article the task of laser Doppler cooling of particles (atoms, ions and molecules), which has important applications for physics and metrology, is considered. It is shown that the laser cooling is the interaction process between a deterministic system of laser radiation and a chaotic system of moving particles. For monitoring and estimation of the cooling particles’ parameters it’s proposed to use the methods and instruments of Nonlinear Metrology that were designed for measurement of nonlinear dynamic systems parameters. The formula for estimating of the laser radiation Shannon entropy, as a function of a laser frequency, is obtained. The results allow to evaluate the change of the entropy of the cooling particles system after a given number of cycles “absorption — spontaneous emission of photons”, which opens the new possibility for control of laser cooling process and estimate of temperature with small discrete values.
The measurement portrait of dynamic variables
(ХНУРЭ, 2016) Machekhin, Yu. P.; Kurskoy, Yu. S.; Prisich, E.
he measurement portrait, like a new measure-ment results analysis tool for dynamic variables of nonlinear dynamic systems, is describes in this ar-ticle. It is proposed because of often insurmount-able diffi culties with the formulation of the meas-urement equation of nonlinear dynamic variables. The measurement portrait is a graphical and nu-merical display of the dynamic variables measure-ment results. Its application allows us to achieve the high information content of the measurement re-sults. An analysis of the measurement portrait al-lows to determine the connection between the dy-namic variables at any time points and a number of other important characteristics of the nonlinear dynamic systems.
Topological methods in measurement and research of nonlinear dynamical systems
(ХНУ, 2018) Kurskoy, Yu. S.; Machekhin, Yu. P.; Gnatenko, A. S.
The authors substantiate the need to create a special theory of measurement and analysis of measurement results for nonlinear dynamical systems. The theory should be based on the principles of the open systems theory, dynamic chaos theory and synergetics theory. The authors analyzed the main topological methods and tools for studying of nonlinear dynamic systems. The main characteristics of nonlinear dynamical systems (interval values of dynamic variables, strong dependence on initial conditions and noise, complex, often chaotic dynamics, evolution) were systematized. It was proposed the next topological tools for analysis of measurement results in nonlinear dynamical systems: measurement portrait, Shennon entropy, fractal dimension, forecasting time.
Topological Model of Laser Emission Parameters Research
(CAOL, 2019) Kurskoy, Yu. S.; Hnatenko, O. S.; Machekhin, Yu. P.; Neofitnyy, M. V.
The research paper presents a model for studying both the parameters and dynamics of laser light as a nonlinear dynamic system. The model provides for the measurement of the values of physical quantities by non-linear metrology methods and the analysis of the research findings with topological tools. The model is based on the assumption of interval values of the measured values and the possibility of changing the stationary dynamics into the random one. The model contains an experiment scheme and a procedure for evaluating measurement results. The peculiarity of the model lies in its systemic approach and suitability for measuring and researching stationary and chaotic modes. The model provides for the measurement of the emission parameter values intervals in various modes, of their stability values and time series prediction. Classification of the system dynamics is performed using the fractal dimension. The model can be used both to ensure the stability of the laser light parameters, and to obtain and control random emission.

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