Collinear Acousto-Optic Filtration With Electronically Adjustable Transmission Function

Манцевич, С. Н.; Balakshy, V. I.

doi:10.1109/jphot.2019.2899827

Cited by 10 publications

(3 citation statements)

References 40 publications

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“…It was also shown that in such case the AOTF is not applicable for spectral filtration. To implement spectral filtering, the polarization plane of the output polarizer is along the crystallographic Z or Y axis, and orthogonal to the polarization plane of input polarizer (γ=0° or 90°) [19,20]. Thus, to implement spectral filtering in the presence of a feedback circuit, it is required to split the optical beam into two (signal and feedback beams) applying a beam splitter (BS) and to place after it two polarizers with different orientations of the polarization planes (at β and γ angles).…”

Section: Description Of the Examined Systemmentioning

confidence: 99%

“…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%

See 2 more Smart Citations

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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Section: Description Of the Examined Systemmentioning

confidence: 99%