Oleg Morozov

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Verified

Oleg verified their affiliation via an institutional email.

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• Full professor
• Professor at Kazan State Technical University named after A. N. Tupolev

A method for microwave photonics control of a fibre-optic Bragg grating (FBG) spectral position using a fixed array of addressed comb (FAAC) and artificial neural networks (ANNs) is presented. The model combines an analytical description of the FBG spectral response, using transmission matrix technique taking into account internal inhomogeneities a...

Fiber Bragg grating (FBG) sensors have emerged as advanced tools for monitoring a wide range of physical parameters in various fields, including structural health, aerospace, biochemical, and environmental applications. This review provides a comprehensive overview of FBG sensor technology, focusing on their operating principles, key advantages suc...

The proposed work presents a nested Photonic Crystal Fiber(PCF) with a hexagonal lattice of air holes, capable of supporting Orbital Angular Momentum modes(OAM) and generating a wide-ranging supercontinuum spectrum, further enhancing its utility in various optical applications. The Photonic Crystal Fiber consists of a dense flint SF6 and a very lig...

Addressed Fiber Bragg Structures (AFBS) serve a dual purpose, acting as complex-sensitive elements with two distinct configurations: one involving two Fiber Bragg Gratings (2λ- AFBS) with different Bragg frequencies, and the other employing a single FBG with two π- phase shifts (2π-AFBS). The difference frequency between these configurations acts a...

The paper presents an ultrafast spectrum measurement method based on photonic time stretching technology. The working principle of the photonic time stretch enhanced recording scheme is discussed. This scheme, based on the direct detection, have disadvantages such as loss of information about the phase of the modulated signal, high harmonic distort...

The paper presents a comparison results of three different photonic-assisted instantaneous frequency measurement methods. The working principles of the photonic time stretch enhanced recording scheme, the parallel low-speed optical sampling technique and channelization method with image-rejection down-conversion are presented. Each of the presented...

This work proposes a simple and affordable technology for the manufacturing of a miniature end-face fiber-optic temperature sensor based on a Fabry–Perot interferometer formed from a transparent UV-curable resin. For the manufactured working prototype of the sensor, the sensitivity and operating temperature range were determined, and the methods fo...

Aims: This study aims to develop a highly sensitive fiber optic hydraulic acoustic sensor utilizing a Fabry-Perot interferometer formed inside an open cavity at the end of an optical fiber, enhancing its potential for precise acoustic measurements in various media. Study Design: The research involves experimental design utilizing optical fiber tech...

A surface plasmon resonance biosensor design is presented, comprising of gold - coated six-core microstructured fiber. The designed sensor exhibits phase matching characteristics for a wider refractive index range of 1.37 - 1.41.

In this paper, we intend to extend the bandwidth capabilities of Mach-Zehnder Modulators (MZMs) to unprecedented heights by innovatively integrat ing Lithium Niobate (LiNbO3) on Silicon-on-Insulator (SOI) platforms, thus exploring the frontier of high-speed optical communication. on Insulator (SOI) technology, Our goal is to push the capabilities o...

The paper describes the design and manufacturing process of a fiber optic microphone based on a macro cavity at the end face of an optical fiber. The study explores the step-by-step fabrication of a droplet-shaped macro cavity on the optical fiber’s end surface, derived from the formation of a quasi-periodic array of micro-cavities due to the fuse...

A new hi-accuracy method for slight-shift determination of low-resolution spectra is proposed. The method allows determining a spectrum shift with an accuracy exceeding the spectrum analyzer resolution to more than three orders of magnitude due to the mathematical post-processing. The method is based on representing the spectrum as a continuous and...

—The advancement of 5G technology has led to the need for more efficient and reliable high speed optical networks. As 5G networks become more complex and require higher data rates, the use of high order modulation schemes such as (64-128- 256 QAM) is becoming increasingly important. To meet these requirements, careful design and optimization of opt...

— Developing optical networks with low latency and high bandwidth is necessary for the next generation of high-speed cellular technologies. It is anticipated that coherent wavelength division multiplexing passive optical networks, also known as WDM-PONs, will play a significant part in these applications. We demonstrate a coherent optical system tr...

Featured Application Interrogation systems of fiber-optic sensors. Abstract Fiber Bragg gratings are sensitive elements in fiber optic sensor networks, and this paper discusses the practicalities of using neural network algorithms to determine their central wavelengths. The problem is to determine the central wavelength of a single sensor, the par...

This work presents a fabricated silica few-mode microstructured optical fiber (MOF) with a special six GeO2-doped core geometry, an outer diameter of 125 µm (that corresponds to conventional commercially available telecommunication optical fibers), and improved induced twisting up to 500 revolutions per 1 m (under a rotation speed of 1000 revolutio...

This work presents the design and simulation of an all-optical sensor for detection of cancer cells. The proposed device is based on the surface plasmon resonance effect on a spiral shaped photonic crystal fiber structure. The finite element method (FEM) based simulations are carried out for the different cancer cells, such as HELA, Basal, Jurkat,...

The work is dedicated to a comparative analysis of the following methods for fiber Bragg grating (FBG) spectral response modeling. The Layer Sweep (LS) method, which is similar to the common layer peeling algorithm, is based on the reflectance and transmittance determination for the plane waves propagating through layered structures, which results...

An addressed fiber Bragg structure (AFBS) is a special type of fiber Bragg grating simultaneously performing the functions of a two-frequency radiation shaper and a sensitive element. An AFBS forms a two-frequency optical spectral response at its output, the difference frequency of which is invariant to measured physical fields and is referred to a...

Agglomeration of distributed particles is the main problem in polymer composites reinforced with such particles. It leads to a decrease in mechanical performance and its poor reproducibility. Thus, development of methods to address the agglomeration of particles is relevant. Evaluation of the size and concentration of agglomerates is required to se...

Nowadays, the classical aperture theory is supplemented by data on the properties of electromagnetic fields in the near radiated field zone. A fundamental feature of the functioning of antennas in this area is the possibility of spatial focusing of electromagnetic energy. In this case, it is possible to realize the maximum field strength at a given...

This manuscript presents a ring-core Bragg Fiber (RC-BF) for orbital angular momentum (OAM) modes propagation and supercontinuum generation. The proposed RC-BF is composed of alternating layers of soft glasses SF57 and LLF1 to render high nonlinearity to the fiber. Mode analysis using full-vectorial finite element method resulted in obtaining HE/EH...

This paper presents a systematic numerical investigation of a surface plasmon resonance (SPR) sensor based on photonic crystal fiber (PCF). The proposed design is modeled and simulated using the full vectorial finite-element (FV-FEM) technique and sensing characteristics such as confinement loss behaviors, phase matching and sensitivity are investi...

The design of a refractometric sensing system for liquids analysis with a sensor and the scheme for its intensity interrogation combined on a single photonic integrated circuit (PIC) is proposed. A racetrack microring resonator with a channel for the analyzed liquid formed on the top is used as a sensor, and another microring resonator with a lower...

In this paper, Proposing a method for high-speed data transmission using optical fibers over a distance of up to 12 km using a vertical cavity surface emission laser (VCSEL) with 850/880 nm with pulse amplitude modulation (4-PAM). Discuss structural design, position control, and related data transfer performance.

Photonic-assisted receivers for instantaneous microwave frequency measurement are devices used to measure the instantaneous frequency and amplitude of one or more microwave signals in the optical range, typically used in radar systems. Increasingly higher demands are placed on frequency range, accuracy and resolution during the development of insta...

Five years ago, the concept of addressed fiber Bragg structures (AFBS) was proposed, which simultaneously perform the functions of a two-frequency radiation shaper, the difference frequency of which is the AFBS address, and a sensitive element, since the value of the difference frequency is invariant to measured physical fields, and the set of diff...

Abstract: The design and usage of the addressed combined fiber-optic sensors (ACFOS) and the multisensory control systems of the greenhouse gas concentration on their basis are investigated. The main development trend of the combined fiber-optic sensors (CFOSs), consisting of the fiber Bragg grating (FBG) and the Fabry-Perot resonator (FPR), which...

The design and usage of the addressed combined fiber-optic sensors (ACFOSs) and the multisensory control systems of the greenhouse gas concentration on their basis are investigated herein. The main development trend of the combined fiber-optic sensors (CFOSs), which consists of the fiber Bragg grating (FBG) and the Fabry–Perot resonator (FPR), whic...

The design and usage of the addressed combined fiber-optic sensors (ACFOS) and the multisensory control systems of the greenhouse gas concentration on their basis are investigated. The main development trend of the combined fiber-optic sensors (CFOS), consisting of the fiber Bragg grating (FBG) and the Fabry-Perot resonator (FPR), which are success...

Our knowledge of electromagnetic heating’s effect on heavy oil upgrading is largely based on very limited data. The aim of the present research was thus to study in detail the effect of microwave exposure in the absence and presence of nanosized magnetite on the composition of heavy oil. The obtained data reveal that the use of nanosized magnetite...

We propose a system and a technique to measure misalignments of individual optical elements in a deployable telescope for a small satellite, and we demonstrate its application for a 2230 mm F10.3 Ritchey–Chretien type telescope. The system uses laser point sources at the edge of each of the deploying segments to form an interference pattern at the...

This work presents designed and fabricated silica few-mode optical fiber (FMF) with induced twisting 10 and 66 revolutions per meter, core diameter 11 µm, typical “telecommunication” cladding diameter 125 µm, improved height of quasi-step refractive index profile and numerical aperture 0.22. Proposed FMF supports 4 guided modes over “C”-band. We di...

This work presents results of property researches of fabricated samples of silica few-mode optical fiber (FMF) with induced chirality under twisting 10 and 66 revolutions per meter, core diameter 11 µm, typical “telecommunication” cladding diameter 125 µm and improved height of quasi-step refractive index profile. Proposed FMF supports 4 guided mod...

This article proposes an advanced algorithm for the numerical solution of a coupled nonlinear Schrödinger equations system describing the evolution of a high-power femtosecond optical pulse in a single-mode polarization-maintaining optical fiber. We use the algorithm based on a variant of the split-step method with the Madelung transform to calcula...

Today, no one doubts that fiber Bragg gratings (FBGs) have become the most used tool for measuring various physical parameters, the structural integrity of engineering systems, and the biological activity of living systems [...]

The authors wish to make a change to the author names (adding a new author—Ildaris M [...]

Asingle-mode Yb-doped germanophosphosilicate fiber with ultra-low optical losses (less than 2 dB/km) was fabricated by means of the MCVD method utilizing an all-gas-phase deposition technique developed “in house”. The absorption and luminescent spectral properties of the fiber were thoroughly studied. The photosensitivity of the pristine (non-hydro...

A schematic diagram of a RoF radio-optic system with vortex signals is presented, in which the radio frequency is determined by the difference between the wavelengths of two lasers. It is assumed that the generation of a vortex signal can be performed through a vortex fiber-optic periodic structure, which can be obtained using a technology similar...

Expanding the application areas of polymer composite materials with dispersed filler requires the development of technologies providing the required mechanical characteristics. One of these methods is based on forming a thin polymer shell on the surfaces of particles. At the same time, it is impossible to take into account the mechanical characteri...

The work presents data treatment methods aimed at eliminating the noise in the strain sensor data induced by vibrations of the helicopter blade in flight conditions. The methods can be applied in order to enhance the metrological performance of the helicopter weight estimation system based on the deformation measurement of the main rotor blades. Th...

This work presents fabricated silica microstructured optical fiber with special equiangular spiral six-ray geometry, an outer diameter of 125 µm (that corresponds to conventional commercially available telecommunication optical fibers of ratified ITU-T recommendations), and induced chirality with twisting of 200 revolutions per minute (or e.g., und...

The principles of the formation of dual- and three-frequency symmetric and/or asymmetric radiation in the optical range for the construction of optical vector spectrum analyzers are presented. The scanning radiation is formed by modulating single-frequency tunable radiation on dual-port Mach–Zehnder modulators to scan both dual-frequency and three-...

Nonlinear spectrum distortions are caused by the peculiarities of the operation of charge-coupled device elements (CCD), in which the signal exposition time (Time of INTegration–TINT) is one of the significant parameters. A change of TINT on a CCD leads to a nonlinear distortion of the resulting spectrum. A nonlinear distortion of the spectrum, in...

The article discusses models and methods of image compression in cyber-physical systems. An approach is proposed to determine the significance of image areas in terms of their perception. An algorithm for identifying image significance regions based on an analysis of energy characteristics is described. The algorithm allows building a weight model,...

The chapter considers an approach to numerical integration of the second kind nonlinear coupled Schrödinger equation system, written taking into account second-order dispersion and Raman scattering, which differs from the often-used approach based on the method of splitting into physical processes. The main advantages of the proposed method are its...

This work presents results of researhes of fabricated pilot sample of chiral few-mode optical fiber (FMF) with induced twisting of 10 and 66 revolutions per meter, core diameter 11 µm (that almost corresponds to standard singlemode optical fibers), typical “telecommuniction” cladding diameter 125 µm and improved height of step refractive index prof...