Transformation of Gaussian-like Beam into Bessel Light Beam at Acousto-Optic Interaction

摘要

The process of acousto-optic (AO) interaction of Gaussian-like beam and backward Bessel acoustic beam in acoustically transversely isotropic crystals was investigated. AO diffraction on vertically-polarized (SV-) acoustic wave was studied that allowed involving diagonal components of permittivity tensor into AO-process. It was established that due to the mentioned diagonal components there can be realized isotropic diffraction of Gaussian-like light beam into Bessel light beam with high diffraction efficiency. The proposed scheme of AO diffraction is of interest for obtaining Bessel light beams from Gaussian ones with the possibility of dynamic tuning of their parameters.