An Acousto-Optic Splitter–Rotator of the Plane of Polarization of Two-Color Radiation
Tóm tắt
A method for splitting two-color optical radiation into monochromatic components, whose planes of polarization rotate with the frequency of a sound wave, is proposed. The method is based on the double passage of two-color radiation through an acousto-optical (AO) modulator made of a gyrotropic crystal, as well as on the property of light to change the polarization to the mutually orthogonal one as a result of reflection of circularly polarized radiation from a mirror surface. Experiments were performed using an AO TeO2 cell designed to split two-color Ar laser radiation and confirmed the main conclusions of the theory: the monochromatic components of Ar-laser radiation with rotating polarization planes at a sound frequency of 61 MHz were obtained. The diffraction efficiency was 60%.
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