A few more words on resonant acoustooptical interaction

Vladimir V. Petrov

doi:10.1117/12.447614

6 November 2001 A few more words on resonant acoustooptical interaction

Vladimir V. Petrov

Proceedings Volume 4514, Acousto-Optics and Applications IV; (2001) https://doi.org/10.1117/12.447614
Event: Acousto-Optics and Applications IV, 2001, Gdansk-Jurata, Poland

Abstract

There is considered theoretically the competition near the resonant acousto-optical (AO) conditions of two mechanisms which influence to the diffraction efficiency η_d variation, when the thickness L of the sample (the length of interaction) is changed: (1) the enhancement of η_d due to increase of L, and (2) degradation of η_d due to the increase of optical absorption α_L in crystal. It is shown that: (1) when changing the length of interaction L the maximum diffraction efficiency η_d is changed and shifted in wavelength's scale, reaching the maximum value at defined L which depend on the particular interaction geometry; (2) for particular considered in present work crystals the variation of L is more critical to the wavelength λ change for GaAs as compared to InP; (3) when realizing the optimized geometry of AO interaction closed to resonant condition at frequency 2.5 GHz, the diffraction efficiency in GaAs crystals can reach 8% and in InP 3.5% per 1 mW of conducted electromagnetic power (correspondingly 8000 and 3500% per 1 W of RF power) when the thickness of samples is about 4 mm.

Citation Download Citation

Vladimir V. Petrov "A few more words on resonant acoustooptical interaction", Proc. SPIE 4514, Acousto-Optics and Applications IV, (6 November 2001); https://doi.org/10.1117/12.447614

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KEYWORDS

Crystals

Diffraction

Acousto-optics

Gallium arsenide

Absorption

Adaptive optics

Crystal optics

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