Electronics, Photonics and Cyberphysical Systems

THERMAL ACTIVATION SPECTROSCOPY OF POLYLACTIDE FILMS WITH DISPERSED FILLER

Софья Михайловна Кулемина — 2025-12-26

Polylactide films with different percentages of white soot were studied using thermoactivation spectroscopy. It was shown that the incorporation of the filler into the polymer leads to the formation of sufficiently deep charge traps at the polymer-filler interface. When the composite films are polarized in a negative corona discharge field, these traps provide a stable electret state, making them suitable for use as an active packaging material.

MODEL OF A PHASE-SENSITIVE OPTICAL REFLECTOMETER WITH HETERODYNE DETECTION

Михаил Викторович Дашков — 2025-12-26

The article is devoted to the development of a mathematical model for a phase-sensitive optical reflectometer with heterodyne reception. The model encompasses the formation of the backscatter signal, taking into account amplitude and phase characteristics during probing with a pulse signal using a laser source with specified spectral properties, the consideration of the influence of external local impact on the optical fiber on the backscatter signal characteristics, and the modeling of the receiving device with phase demodulation based on heterodyne detection. The results of testing the model by comparing it with data from a commercial phase-sensitive optical reflectometer are presented.

PRINCIPLES OF DESIGNING AN INTERROGATOR FOR TWO CHIRP-PHASE-SHIFTED FIBER BRAGGING GRATINGS WITH π-PHASE SHIFT IN THE STRUCTURE OF A THERMOCOMPENSATED HYDROSTATIC MEMBRANE-TYPE LIQUID LEVEL SENSOR

Андрей Дмитриевич Проскуряков — 2026-01-13

A hydrostatic liquid level sensor is proposed using two chirped fiber Bragg gratings with a π-phase shift (π-CFBGs) to increase the sensitivity and accuracy of pressure measurements and compensate for temperature effects. This innovative sensor, using radiophotonic interrogation methods, achieves a hydrostatic pressure and water column height measurement accuracy of ±0.1%, and a temperature measurement accuracy of ±0.01°C. Measuring the beat frequency between components at the transparency window frequency of the first π-FBG, embedded in the sensor membrane and sensitive to hydrostatic pressure and temperature, and at the transparency window frequency of the second π-FBG, sensitive only to temperature and freely positioned in the fiber input tube to the membrane, allows for compensation for changes in liquid temperature. This article discusses the design principles of an interrogator for two π-FBGs within the structure of a temperature-compensated hydrostatic membrane-type liquid level sensor.

A THERMOCOMPENSATED HYDROSTATIC MEMBRANE-TYPE LIQUID LEVEL SENSOR WITH TWO INTEGRATED ADDRESS FIBER BRAGG STRUCTURES

Андрей Дмитриевич Проскуряков — 2026-01-16

A hydrostatic liquid level sensor is proposed using two addressable wave-type fiber Bragg structures (2l-AFBS) embedded in a membrane to improve the sensitivity and accuracy of pressure measurement. To compensate the temperature effects, sensor variants are proposed that incorporate 2λ-AFBS sensor data into fibers with different doping additives or incorporate an additional 2λ-AFBS into the sensor structure, providing readings independent of liquid level. This innovative sensor, using microwave photonic interrogation methods, provides a level measurement sensitivity of 0.26 pm/mm while increasing the signal-to-noise ratio by up to 7 times. In the maximum configuration, all three 2λ-AFBS have a single central Bragg wavelength and different address frequencies, enabling their identification when interrogated from a single combining fiber and demonstrating the potential for achieving a higher level of multiplexing both within a single monitored vessel and across multiple ones.

MICROWAVE PHOTONICS TECHNOLOGIES AND THEIR ADVANTAGES IN THE RADIATION PATTERN FORMATION OF FREQUENCY-SEPARATED ANTENNAS

Владимир Дмитриевич Андреев — 2026-01-21

A method for generating photonic signals for frequency diverse arrays (FDA) using two optical frequency combs (OFC) based on tandem amplitude-phase modulation and frequency multiplication is proposed. The method allows obtaining two-channel signals with different frequency offsets without hybrid couplers and complex modulators, which simplifies the system architecture and reduces losses. The formed radiation pattern has a point-like shape, which improves the resolution of the system.

MONITORING OF LITHIUM-ION BATTERIES USING FIBER-OPTIC SENSORS

Виталий Юрьевич Казаров — 2026-01-21

Lithium-ion batteries are key components of modern energy storage systems; however, their internal state remains poorly monitored during operation. This paper explores the use of fiber-optic sensors for embedded real-time monitoring of the physicochemical parameters of batteries. The principles of building quasi-distributed sensor systems based on addressed fiber Bragg grating structures are presented, enabling the measurement of strain, temperature, electrolyte refractive index, and ion concentration. The developed approach contributes to the creation of intelligent batteries with enhanced reliability and safety.

MONITORING OF TEMPERATURE AND CONCENTRATION OF VENTI-LATION GAS OF THE BATTERY

Виталий Юрьевич Казаров — 2026-01-22

A fiber-optic sensor for monitoring the temperature and concentration of ventilation gas in lithium-ion batteries is presented. The sensor combines an addressed fiber Bragg structure (AFBS) with a Fabry-Perot resonator (FPR) in the form of a polymer film applied to the fiber end. The working principle and mathematical model of the sensor are described, enabling simultaneous measurement of two parameters through analysis of changes in the spectral characteristics of AFBS and FPR. Simulation results demonstrate high spectral contrast of the reflected radiation and the possibility of separating temperature and gas concentration responses.

STRUCTURAL HEALTH MONITORING SYSTEM FOR UAV BASED ON ADDRESS MICROWAVE PHOTONICS SENSORS

Игорь Юрьевич Муравьев — 2026-01-22

A microwave photonics structural health monitoring system for unmanned aerial vehicles is proposed. It is based on a two-fiber method modified by replacing fiber Bragg gratings with address fiber Bragg structures and using a microwave photonics interrogator. The system enables simultaneous measurement of temperature and deformation of structural elements with high accuracy and eliminates the influence of electromagnetic interference.

MICROWAVE PHOTONIC SYSTEM FOR MONITORING THE PATIENT'S POSITION ON THE BED. THE PHOTONIC PART

Радик Масхутович Муратов — 2026-01-22

A microwave photonic system for monitoring a patient's position on a bed is presented, designed to prevent falls during rehabilitation. The system is based on cantilever sensors with two-component addressed fiber Bragg structures (AFBS) placed along the mattress

MICROWAVE PHOTONIC SYSTEM FOR MONITORING THE PATIENT'S POSITION ON THE BED. THE RADIOFREQUENCY PART

Радик Масхутович Муратов — 2026-01-22

The radiofrequency part of a microwave photonic system for monitoring a patient's position on a bed is described. A signal processing method based on a normalized modulation coefficient is proposed, allowing the determination of Bragg frequencies of addressed fiber Bragg structures and the force applied by the patient. Analytical expressions for the modulation coefficient and its normalized form are provided, as well as the dependence of the normalized modulation coefficient on the shift of the central Bragg frequency for various parameters of the optical filter with a slanted linear characteristic.

SIMULTANEOUS MONITORING OF TEMPERATURE AND HUMIDITY USING A PARALLEL FABRY-PEROT INTERFEROMETER

Дмитрий Сергеевич Грабовецкий — 2026-01-23

This paper proposes a fiber-optic sensor based on a parallel Fabry-Perot interferometer with two cavities filled with polydimethylsiloxane and polyimide for simultaneous temperature and humidity monitoring by leveraging the Vernier effect.

WATER SALINITY SENSORS BASED ON FIBER-OPTIC FABRY-PEROT INTERFEROMETERS

Николай Александрович Петров — 2026-01-23

An overview of fiber-optic water salinity sensors based on Fabry-Perot interferometers is presented. Three types of sensor structures are considered: a Fabry-Perot composite cavity with an air gap and a quartz element, an open cavity created by femtosecond laser radiation, and a cavity formed by catastrophic melting followed by the creation of a channel for liquid access.

FIBER-OPTIC FABRY-PEROT INTERFEROMETER AS A DEPTH DETECTION SENSOR

Николай Александрович Петров — 2026-01-23

This paper reviews extrinsic fiber-optic Fabry-Perot interferometers (FPI) for water depth measurement. A fiber-optic sensor system for depth detection is proposed, incorporating an addressed fiber Bragg structure (AFBS) for temperature cross-sensitivity and enabling practical signal detection without bulky optical spectrum analyzers.

SIMULTANEOUS MONITORING OF TEMPERATURE AND PRESSURE USING A PARALLEL FABRY-PEROT INTERFEROMETER

Денис Сергеевич Грабовецкий — 2026-01-23

This paper presents a fiber-optic sensor based on a parallel Fabry-Perot interferometer with two polymer-filled cavities for the simultaneous measurement of temperature and pressure utilizing the Vernier effect.

CANTILEVER TYPE MICROWAVE PHOTONICS SENSOR FOR FLOW MEASUREMENT

Андрей Александрович Потанин — 2026-01-23

A cantilever-type microwave photonics sensor for fluid flow measurement based on a pair of fiber Bragg gratings attached to the inner surface of a hollow cylindrical cantilever is presented. The potential use of addressed fiber Bragg structures for determining flow direction and instability is considered, and the problem of low flow rate measurement is highlighted.

CANTILEVER TYPE MICROWAVE PHOTONICS SENSOR FOR FLOW MEASUREMENT

Андрей Александрович Потанин — 2026-01-23

The ways to improve the resolution and accuracy of fiber-optic flow meters based on fiber Bragg grating through the use of microwave photonics methods and advanced addressed fiber Bragg structures are analyzed. Research objectives aimed at overcoming the limitations of traditional FOFMs in the field of low flow rates, temperature stability, noise immunity, and long-term operation in real field conditions are formulated.

MEASUREMENT OF ETHANOL CONCENTRATION BY A FIBER-OPTIC REFRACTOMETRIC SENSOR

Александр Павлович Субботин — 2026-01-26

A structure of a fiber-optic refractometric sensor for ethanol concentration measurement is proposed, based on a phase-shifted fiber Bragg grating (π-FBG) and a two-frequency probing method. The sensor implements a parallel measurement scheme, allowing simultaneous determination of temperature and effective refractive index of the environment.

WAYS TO DEVELOP FIBER-OPTIC SENSORS FOR MEASURING ETHANOL CONCENTRATION

Александр Павлович Субботин — 2026-01-26

An analytical review of fiber-optic sensors for measuring ethanol concentration in aqueous solutions and fuel mixtures is presented. Their characteristics are analyzed: sensitivity, resolution, measurement range, temperature stability. Problems of fragility, cross-sensitivity and high interrogation cost are noted. As a promising direction, the use of addressed fiber Bragg structures in combination with microwave photonics interrogators is proposed to reduce cost and improve measurement reliability.

MICROWAVE PHOTONIC SYSTEM FOR MONITORING THE PATIENT'S POSITION ON THE BED. THE PHOTONIC PART

Серафим Наилевич Нигматуллин — 2026-01-27

This article provides an analysis of fiber-optic methods for measuring liquid flow velocity, comparing point and distributed sensing techniques by using address fiber Bragg structures.

MICROWAVE PHOTONICS INTERROGATION OF THE WATER LEVEL DIAPHRAGM SENSOR

Андрей Дмитриевич Проскуряков — 2026-01-27

This paper details the design and analysis of a microwave photonics interrogation system for a water level sensor based on a diaphragm and two addressable fiber Bragg structures.

MICROWAVE PHOTONICS HYDROSTATIC PRESSURE SYSTEM FOR MONITORING THE WATER LEVEL IN THE TANK

Aндрей Дмитриевич Проскуряков — 2026-01-27

This paper presents a microwave photonics water level monitoring system based on a hydro-static pressure sensor that uses two sequential address fiber Bragg structures with a membrane.

MEASURING THE FREQUENCIES OF A SET OF RADIO LOCATION SIGNALS BY THE MICROWAVE PHOTONICS METHOD

Григорий Сергеевич Потапов — 2026-01-27

This paper presents a microwave photonics method for instantaneously measuring the frequencies of multiple radio location signals using a two-channel system that employs an optical frequency comb.

RADIATION PATTERN OF FREQUENCY-SEPARATED ANTENNAS USING AN AMPLITUDE-PHASE SHAPER

Владимир Дмитриевич Андреев — 2026-01-27

The method of applying the Il'in–Morozov tandem amplitude-phase modulation method to signal shapers for frequency diverse arrays is investigated. It is shown that the use of it enables carrier suppression up to 60 dB, which is significantly higher than in conventional Mach–Zehnder amplitude modulator schemes. Analysis of the radiation spectral characteristics demonstrates the ability to control the harmonic composition and minimize beat notes by optimizing the modulation depth. The proposed approach reduces pattern formation errors and improves system stability.

COLLISION DETECTION WHEN MEASURING TWO SPECTRAL COMPONENTS IN A SINGLE FREQUENCY COMB

Григорий Сергеевич Потапов — 2026-01-28

This study analyzes collision scenarios in frequency measurement systems using an optical frequency comb, where ambiguous results occur when measuring two simultaneous radio signals.