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<p>Peculiarities of acousto-optical modulation of annular light beams with the wavelength of 532 nm on longitudinal ultrasound waves in paratellurite crystals are theoretically and experimentally investigated. The dependence of the diffraction efficiency of annular beams on the acousto-optical interaction length and ultrasound power is calculated using the two-dimensional coupled wave theory. The bandwidth of modulator frequency tuning on annular beams of ~42–45 MHz is achieved at the level of 3 dB for a central ultrasound frequency of 100 MHz. It is shown that the bandwidth differs insignificantly for an incident light beam of annular and Gaussian shape.</p>

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Acousto-Optical Modulation of Annular Light Beams on Longitudinal Ultrasonic Waves in Paratellurite Crystals

  • 期刊论文

  • 发表日期：

    2026年1月15日

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  • A. M. Varanetsky,
  • A. V. Agashkov,
  • G. V. Kulak,
  • P. I. Ropot,
  • L. A. Tozik

摘要

Peculiarities of acousto-optical modulation of annular light beams with the wavelength of 532 nm on longitudinal ultrasound waves in paratellurite crystals are theoretically and experimentally investigated. The dependence of the diffraction efficiency of annular beams on the acousto-optical interaction length and ultrasound power is calculated using the two-dimensional coupled wave theory. The bandwidth of modulator frequency tuning on annular beams of ~42–45 MHz is achieved at the level of 3 dB for a central ultrasound frequency of 100 MHz. It is shown that the bandwidth differs insignificantly for an incident light beam of annular and Gaussian shape.