Examination of optoelectronic feedback effect on collinear acousto-optic filtration

Манцевич, С. Н.; Balakshy, V. I.

doi:10.1364/josab.35.001030

Cited by 15 publications

(4 citation statements)

References 32 publications

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“…In this case, due to a decrease in the acoustic power density, the AO diffraction efficiency is inversely proportional to the width of the ultrasound transducer. Despite the fact that this model seems to be crude, it describes well the results of most known works on acousto-optics [ 10 , 11 , 12 ]. This is because of the common use of high frequency ultrasound of about 100 MHz and above.…”

Section: Introductionsupporting

confidence: 64%

Optimal Design of an Ultrasound Transducer for Efficient Acousto-Optic Modulation of Terahertz Radiation

Nikitin

Gerasimov

2022

Materials

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Acousto-optic (AO) interaction in the terahertz range was investigated with the use of monolithic ultrasound transducers of various widths. Sulfur hexafluoride (SF6) liquefied at a temperature of about 23 ∘C and a pressure of 25 bar was used as a medium for AO interaction. The angular and frequency bandwidths of effective AO interaction, as well as the diffraction efficiency per 1 W of the driving electric power, were determined. For the first time, a correct comparison of the AO diffraction efficiency in SF6 with the use of ultrasound transducers with different widths was carried out. In the experiments performed, the highest energy efficiency of the AO modulator was achieved with a transducer with a width of 12 mm.

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Section: Introductionsupporting

confidence: 64%

Optimal Design of an Ultrasound Transducer for Efficient Acousto-Optic Modulation of Terahertz Radiation

Nikitin

Gerasimov

2022

Materials

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“…In the previous studies considering only the feedback beam it was shown that the system has several operating modes depending on the feedback gain factor κ magnitude [24], [25]. At relatively low gain values, the system behave like a conventional AO filter -the central transmission wavelength can be tuned by varying the RF generator frequency.…”

Section: Basic Relationsmentioning

confidence: 99%

Collinear Acousto-Optic Filtration With Electronically Adjustable Transmission Function

Манцевич

Balakshy

2019

IEEE Photonics J.

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An acousto-optic system containing collinear acousto-optic filter fabricated from calcium molybdate crystal and a positive electronic feedback was examined. The feedback signal is formed due to the optical heterodyning effect that appears for the special geometry of polarizer and analyzer polarization planes mutual orientation between which the collinear filter is located. It is shown that the feedback circuit electrical parameters variation enable controlling the spectral characteristics of the acousto-optic collinear filtration, resulting in enhancing the maximal spectral resolution and transmission function side lobes suppression.

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“…The system considered in this paper belongs to the class of AO devices with an optoelectronic feedback [5,6]. Such systems are known for the complexity of their behavior and the variety of operating regimes [7][8][9][10][11][12][13][14][15][16][17][18][19][20][21].…”

Section: Introductionmentioning

confidence: 99%

“…In this paper, we study the possibility to compensate the optical beam divergence effect on the AO device transmission function by introducing an optoelectronic feedback circuit both experimentally and theoretically. Feedback connects the optical output of the AO device and its piezoelectric transducer [14][15][16][17][18][19][20][21]. The study was carried out on the example of collinear AO interaction [22].…”

Section: Introductionmentioning

confidence: 99%

Wide-angle acousto-optic diffraction spectral selectivity enhancement by optoelectronic feedback introduction

Mantsevich,

Slinkov

2022

Proceedings of the 10th Convention of the European Acoustics Association Forum Acusticum 2023

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One of the acousto-optic (AO) tunable filters applications is the filtration of divergent optical beams, for exampleimage spectral filtration. In this case, the so-called wideangle or tangential AO interaction geometry is used. Unfortunately, such AO devices usually do not have a high spectral resolution, and an increase in the light beam divergence leads to an even greater widening of the AO device transmission function, since the AO phase matching condition for the lateral components of the optical beam spatial spectrum differs from those for the axial components. In this paper we examine the possibility of improving the spectral resolution of a wide-angle AO tunable filter by introducing optoelectronic feedback connecting the optical output of the AO cell and its piezoelectric transducer. The study is carried on the example of collinear AO interaction (a special case of highfrequency wide-angle diffraction). It is shown that the feedback introduction makes it possible to improve the spectral contrast and narrow the AO filter passband up to 20 times, while AO cell transfer function, which determines the value of AO filter angular aperture, remains unchanged.

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Examination of optoelectronic feedback effect on collinear acousto-optic filtration

Cited by 15 publications

References 32 publications

Optimal Design of an Ultrasound Transducer for Efficient Acousto-Optic Modulation of Terahertz Radiation

Optimal Design of an Ultrasound Transducer for Efficient Acousto-Optic Modulation of Terahertz Radiation

Collinear Acousto-Optic Filtration With Electronically Adjustable Transmission Function

Wide-angle acousto-optic diffraction spectral selectivity enhancement by optoelectronic feedback introduction

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