Transmission function of collinear acousto-optical interaction occurred by acoustic waves of finite amplitude

Shcherbakov, Alexandre S.; Arellanes, Adán Omar; Немов, С. А.

doi:10.1364/josab.30.003174

Cited by 17 publications

(3 citation statements)

References 11 publications

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“…, which combines contributions of the material and the acoustic power, where M 2 is the figure of AO merit and P is the acoustic power density [12] [13] were analyzed for a triplet of the relative frequency bandwidths Δf/f 0 = 0, 0.25, and 0.5 (here, f 0 is the central acoustic frequency within the bandwidth ∆f [14].…”

Section: Efficiency Of Normal Light Scattering With a Given Bandwidthmentioning

confidence: 99%

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An Advanced Multi-Band Acousto-Optical Radio-Wave Spectrometer with Multi-Channel Frequency Processing for Astrophysical Studies

Shcherbakov¹,

Dagostino²,

Arellanes³

et al. 2016

IJAA

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We present an advanced schematic arrangement of the radio-wave spectrometer with a few parallel optical arms for processing the data flow. This arrangement includes two principal novelties. First of them consists in the proposed design, where each individual optical arm exhibits its original performances providing parallel multi-band observations within a few different scales simultaneously. These optical arms have the beam shapers providing both the needed incident light polarization and apodization to increase the dynamic range. After parallel acousto-optical processing, data flows of all the optical arms are united by the joint CCD matrix on the stage of the combined electronic data processing. The second novelty is in usage of unique wideaperture bastron-based acousto-optical cell providing one of the best performances at the middle-frequencies (about 500 MHz) in comparison with the other available crystalline materials in this range. Such multi-band capabilities have a number of applications in astrophysical scenarios at different scales: from objects in the distant universe to planetary atmospheres in the Solar system. Thus one yields the united versatile instrument, which provides comprehensive studies of astrophysical objects simultaneously with precise synchronization in various frequency ranges.

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Section: Efficiency Of Normal Light Scattering With a Given Bandwidthmentioning

confidence: 99%

“…The . When the acoustic power density P is not too high and acoustic wave attenuation can be characterized as a moderate one, the frequency resolution of AO cell is given by δf ≈ V/D at the level of 0.405 [12]. Thus, the number of resolvable spots can be expressed as…”

Section: The Expected Number Of Resolvable Spots For the Bastron Ao Cellmentioning

confidence: 99%

An Advanced Multi-Band Acousto-Optical Radio-Wave Spectrometer with Multi-Channel Frequency Processing for Astrophysical Studies

Shcherbakov¹,

Dagostino²,

Arellanes³

et al. 2016

IJAA

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“…Calcium molybdate and solid solutions based on it, containing ions of rare earth and transition elements, are of interest as materials of laser technology [3,4], cryogenic phonon-scintillation detectors [5,6], acoustooptics [7,8] and phosphors [9,10]. The possibility of forming solid solutions of powellite with radioactive elements plays an important role in the burial of nuclear waste [11,12].…”

Section: Introductionmentioning

confidence: 99%

Energy of formation of intrinsic defects and their clusters in the powellite CaMoO-=SUB=-4-=/SUB=-

Dudnikova

Antonov

Zharikov

et al. 2022

Physics of the Solid State

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Atomistic simulation of powellite crystals has been carried out. A system of parameters of interatomic potentials is proposed for the calculation of point defects in powellite. The formation energies of intrinsic defects and their clusters, which are spatially related combinations of defects, are estimated. The most favorable localization of interstitial calcium and oxygen ions was determined. The formation energies of the Frenkel and Schottky defects are calculated. It was shown that the most energetically preferred in stoichiometric powellite are the oxygen Frenkel defects. Defects arising from deviations from stoichiometry are considered. It is established that the clustering of defects allows to reduce the energy of their formation by 15-20%. Keywords: powellite, tungstates and molybdates, atomistic simulation, intrinsic defects.

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The Impact of Melt Transparency on Li₂MoO₄ Single Crystal Growth by the Czochralski Technique

Bouzouaoui,

Ayadi,

Brakni

et al. 2024

Cryst. Res. Technol.

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In this paper, it is found that taking a semitransparent melt, influences c–m interface shape, heat transfer, melt flow and von Mises thermal stress distributions, therefore the quality of the grown crystal. As a result, when absorption coefficients of both melt and crystal change from transparent to opaque case, the c–m interface convexity reduces from 12.5 to 5.8 mm, its shape becomes more convex toward the melt, and the maximum von Mises thermal stresses decreases from 69.55 to 13.8 MPa. For the second study, where the crystal absorption coefficient is fixed at , the c–m interface convexity increases with the increase in melt absorption coefficient. The maximum and minimum von Mises stresses for the case are low compared to other values; then the grown crystal has a good quality.

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Transmission function of collinear acousto-optical interaction occurred by acoustic waves of finite amplitude

Cited by 17 publications

References 11 publications

An Advanced Multi-Band Acousto-Optical Radio-Wave Spectrometer with Multi-Channel Frequency Processing for Astrophysical Studies

An Advanced Multi-Band Acousto-Optical Radio-Wave Spectrometer with Multi-Channel Frequency Processing for Astrophysical Studies

Energy of formation of intrinsic defects and their clusters in the powellite CaMoO-=SUB=-4-=/SUB=-

The Impact of Melt Transparency on Li₂MoO₄ Single Crystal Growth by the Czochralski Technique

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Transmission function of collinear acousto-optical interaction occurred by acoustic waves of finite amplitude

Cited by 17 publications

References 11 publications

An Advanced Multi-Band Acousto-Optical Radio-Wave Spectrometer with Multi-Channel Frequency Processing for Astrophysical Studies

An Advanced Multi-Band Acousto-Optical Radio-Wave Spectrometer with Multi-Channel Frequency Processing for Astrophysical Studies

Energy of formation of intrinsic defects and their clusters in the powellite CaMoO-=SUB=-4-=/SUB=-

The Impact of Melt Transparency on Li2MoO4 Single Crystal Growth by the Czochralski Technique

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The Impact of Melt Transparency on Li₂MoO₄ Single Crystal Growth by the Czochralski Technique