Extension of the angular scanning range of the acousto-optic deflector with a two-element phased-array piezoelectric transducer

Антонов, С. Н.; Vainer, A. V.; Proklov, V. V.; Rezvov, Yu. G.

doi:10.1134/s1063784213090053

Cited by 14 publications

(5 citation statements)

References 4 publications

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“…For the analytical description of the AO diffraction we use plane-wave one-dimensional coupled-mode equations (CMEs) [53]. Rigorous CME solutions for a periodic acoustic field were previously analyzed by Antonov et al [45] and by Balakshy et al [54]. These results include a general-form matrix formalism for computing the performance of a Bragg cell with a multi-element transducer.…”

Section: Theoretical Analysismentioning

confidence: 99%

“…One of the methods for increasing the performance of AO devices is application of phased-array piezoelectric transducers for the excitation of ultrasound accompanied by beam steering. Phased-array transducers have been used in AO devices for broadening the operation bandwidth of deflectors and AOTFs [42][43][44][45][46]. In addition, a multi-section piezoelectric transducer can be used for the apodization of acoustic fields and the improvement of the an AOTF's transmission function [47][48][49].…”

Section: Introductionmentioning

confidence: 99%

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Acousto-Optic Transfer Function Control by a Phased-Array Piezoelectric Transducer

Yushkov,

Chizhikov,

Molchanov

2023

Photonics

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We present analysis and numerical simulations of the acousto-optic spatial filter (AOSF) transfer function under the condition of dual-transducer operation and phase control. Based on these simulations, the AOSF crystal configuration is optimized for operation in the near-infrared wavelength region from 0.7 to 1.0 μm. We demonstrate that ultrasonic phase control can provide efficient tuning of the transfer function, which is independent of conventional frequency control. Thus, the application of phase control coupled with frequency control can reduce the transfer function asymmetry that is inherent to anisotropic Bragg diffraction in uniaxial crystals.

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Section: Theoretical Analysismentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Acousto-Optic Transfer Function Control by a Phased-Array Piezoelectric Transducer

Yushkov,

Chizhikov,

Molchanov

2023

Photonics

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“…24,25 However, these solutions are quite technically complex. In 26 shows the possibility of expanding the scanning range of AOD using only two-element piezoelectric transducer Figure 12. Figure 12 The scheme of the deflector with the two transducers P1 and P2.…”

Section: Deflector With Two-element Phased Array Piezoelectric Transd...mentioning

confidence: 99%

A review of physical principles and applications of acousto-optic deflectors on the basis paratellurite

Антонов¹,

Kotelnikov²

2019

PAIJ

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Deflectors based on Bragg non-axial anisotropic diffraction in a paratellurite crystal are considered. Practically significant relations connecting the main parameters are obtained, the factors limiting the diffraction efficiency and the angular scanning range are determined. The mode of multibeam acousto-optic diffraction as a method of creating a multichannel optical information output system is considered. A review of several new, practically implemented methods for increasing the main functional parameters of deflectors is presented. The possibility of using the diffraction mode in the second Bragg maximum in terms of sound amplitude to extend the scanning band is shown. The two-crystal scheme of the deflector, which can significantly improve the efficiency of diffraction, expand the scanning range and create a polarization-insensitive deflector, is considered. Acousto-optic switch of fiber-optic channels was developed. The possibility of using multibeam acousto-optic diffraction to improve the energy efficiency of laser radiation by modifying its profile is established

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“…However, such a cell was very difficult to manufacture, so planar structures were then proposed [ 5 , 6 , 7 , 8 , 9 ]. A planar structure is shown in Figure 1 ; in the first variant ( Figure 1 a), one piezoelectric plate (shown in green) is used, and separate sections are formed by partitioning the internal and external electrodes.…”

Section: Introductionmentioning

confidence: 99%

Acousto-Optic Cells with Phased-Array Transducers and Their Application in Systems of Optical Information Processing

et al. 2021

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This paper presents the results of theoretical and experimental studies of anisotropic acousto-optic interaction in a spatially periodical acoustic field created by a phased-array transducer with antiphase excitation of adjacent sections. In this case, contrary to the nonsectioned transducer, light diffraction is absent when the optical beam falls on the phased-array cell at the Bragg angle. However, the diffraction takes place at some other angles (called “optimal” here), which are situated on the opposite sides to the Bragg angle. Our calculations show that the diffraction efficiency can reach 100% at these optimal angles in spite of a noticeable acousto-optic phase mismatch. This kind of acousto-optic interaction possesses a number of interesting regularities which can be useful for designing acousto-optic devices of a new type. Our experiments were performed with a paratellurite (TeO2) cell in which a shear acoustic mode was excited at a 9∘ angle to the crystal plane (001). The piezoelectric transducer had to nine antiphase sections. The efficiency of electric to acoustic power conversion was 99% at the maximum frequency response, and the ultrasound excitation band extended from 70 to 160 MHz. The experiments have confirmed basic results of the theoretical analysis.

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Extension of the angular scanning range of the acousto-optic deflector with a two-element phased-array piezoelectric transducer

Cited by 14 publications

References 4 publications

Acousto-Optic Transfer Function Control by a Phased-Array Piezoelectric Transducer

Acousto-Optic Transfer Function Control by a Phased-Array Piezoelectric Transducer

A review of physical principles and applications of acousto-optic deflectors on the basis paratellurite

Acousto-Optic Cells with Phased-Array Transducers and Their Application in Systems of Optical Information Processing

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