Matrix of piezoelectric resonators for registration of spatial distribution of laser radiation

Zotov, K. V.; Bazarov, Timur O.; Fedorov, Vladimir V.; Savichev, Ilya A.; Korolkov, A. E.; Mukhankov, Denis; Konyashkin, A. V.; Ryabushkin, O. A.

doi:10.1117/12.2521562

Cited by 5 publications

(2 citation statements)

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“…Как правило, теоретические методы определения закона распределения плотности потока мощности не отличаются высокой точностью. Поэтому для решения указанной проблемы разрабатываются различные экспериментальные методы и приборы для их реализации [11].…”

Section: рис 2 график распределения мощности в круглом поперечном сечении лазерного излученияunclassified

Photo-elastic Effect Features Used for Measuring Laser Radiation Parameters

Гасанов

Gasanov

Guseinov

et al. 2020

jour

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The article discusses the photo-elastic effect features in acousto-optic processors for processing pulse signals on the time axis. The photo-elastic interaction in these devices is divided into two areas. In the first area, the input pulse duration is longer than the time of intersecting the optical beam by the elastic wave packet. This particular area is widely used in the practical applications of these processors, where it is a priori assumed that the input pulse duration is longer than the time for the elastic wave packet to intersect the optical beam.In the second area, the input pulse duration is less than the time for the optical beam to be intersected by the elastic wave packet. The objective of this work is to study the photo-elastic effect features in this area. It was established that in this area the pulse duration at the processor output is equal to the time for the optical beam to be intersected by the elastic wave packet and does not depend on the input pulse duration, which is permissible in some cases (for example, in radar pulse existence rather than its duration is recorded). It is shown that in the second area, the output pulse is formed as the sum of three terms. The first term corresponds to the elastic wave packet entering the optical beam. The second term corresponds to the elastic wave packet advancement in the optical beam aperture, and the third one keeps with the elastic wave packet leaving the aperture of the optical beam. The corresponding equations for calculating the pulse at the device output are obtained. The numerical calculations have proved the provisions and patterns established. The numerical modeling results were tested experimentally using a prototype of an acousto-optic processor with direct detection. The analysed results of theoretical and experimental studies unequivocally confirmed that the obtained formulas, formulated statements, and established provisions can be used to expand the functionality of acousto-optic processors, both with direct detection and of heterodyne type. It is shown that with a significant decrease in the input pulse duration relative to the time during which the optical beam is intersected by the elastic wave packet, the latter is converted into a scanning line and can be used to measure the geometric and energy characteristics of the quasi-coherent light.

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Section: рис 2 график распределения мощности в круглом поперечном сечении лазерного излученияunclassified

Photo-elastic Effect Features Used for Measuring Laser Radiation Parameters

Гасанов

Gasanov

Guseinov

et al. 2020

jour

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“…Therefore, various experimental measurement methods and devices for their implementation are developed for solving this task. For solving this task, paper [8][9][10][11][12] proposes a matrix of piezoelectric resonators that can be preferably applied for measuring the distribution of power flux density of relatively lowpower lasers. The measurement method described in [5,[13][14][15][16][17] is suitable for solving the specified task (problem) as applied for high-power lasers.…”

Section: Introductionmentioning

confidence: 99%

Acousto-Optical Receiver of an Obstruction Passive Radar System

Rustamov,

Kerimov,

Mammedov

et al. 2023

A.I.S.

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The subject of research in the article is the passive radar system of a warship. The purpose of the work was to review the characteristics use of the acousto-optical receiver in the new passive radar system of the warship, to investigate the peculiarities of acoustooptic effect and the relevant synthesis of methods and tools for measuring the photodetector photoelectric characteristics and, in addition, to investigate the energy-and-geometric parameters of laser radiation Justification. It is shown that the transition, impulse and frequency characteristics are taken as the main means to determine the operating and technical parameters of the acousto-optical delay line. It is not possible to unambiguously extrapolate these characteristics to the known models of the characteristics of the acousto-optic radar receiver created on AODL. Research results. In the context of this postulate, mathematical models of the main characteristics of AODL were developed. On the basis of the synchronous compensation pulse obstacles applied to the passive radar acousto-optic receiver on military ships, the full compensation of the obstacles is determined for the effective reception of signals from the acousto-optic receiver. In radar stations (radar), the main attention is focused on the statistical properties of the useful signal and passive obstacles, the speed (frequency) of the signal passing through the passive obstacle and the space-time differences. The recommendations. These features are recommended to be used only in special cases where the target is outside the reflectors for informational duration, amplitude and differences between passive obstacles, obstacle silencing and signal separation. Conclusion. Applying the full attenuation of the band filter and synphase barrier organizers, whose frequency characteristics do not depend on the tuning frequency, it is possible to provide full compensation of obstacles during the effective reception of signals by the acousto-optic receiver in the passive radar system of warships based on the proposed method for high resistance to obstacles, pulse obstacle compensation.

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