Acousto-optic interaction in a non-homogeneous acoustic field excited by a wedge-shaped transducer |
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Authors: | Balakshy Vladimir I Linde Bogumil B J Vostrikova Anna N |
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Institution: | a Moscow State University, Department of Physics, Vorobyevy Gory 1, 119991 Moscow, Russia b University of Gdańsk, Institute of Physics, 80-952 Gdańsk, Poland |
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Abstract: | The article is devoted to theoretical analysis of light diffraction in a non-homogeneous acoustic field created by a wedge-shaped piezoelectric transducer. Relationships describing electrical, acoustic and acousto-optic properties of the acousto-optic cell are derived in the approximation of a small thickness of the piezoelectric plate. Principal characteristics of acousto-optic interaction are examined such as dependences of the light diffraction efficiency on the phase mismatch and the acoustic wave amplitude. It is shown that the acoustic field has a complicated amplitude-phase structure changing with the acoustic frequency. It is demonstrated that the diffraction efficiency in the Bragg regime can approach 100% in spite of a noticeable phase mismatch. The appropriate optimal values of ultrasound power and incidence angles of light are found. |
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Keywords: | Acousto-optic interaction Bragg regime Piezoelectric transducer Acousto-optic cell |
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