Study on the far-field acoustic beam characteristics of transducer array of acousto-optic modulator

Document Type

Article

Publication Date

10-1-2011

Abstract

The far-field solution based on the Helmholtz equation was studied and the far distance distribution model of the transducer was proposed to make the acousto-optic modulator (AOM) transducer realize a better distribution mode in the output plane and to make the diffraction light get better transmission characteristic. Based on the theoretical model, the simulation analysis of the far field sound intensity beam distribution of the transducer section, the sound intensity distribution of the transmission center axis, the beam width and other characteristics of the beam, and using the method of calculating the laser diffraction efficiency to verify the simulation results. Experiments show that the test data and theoretical models agree with each other well. In 90% of the energy region, the error of the theoretical model fitting the test data is less than 5%, the acousto-optic crystals has the best mode conversion efficiency of 2.08 mm ≤ z ≤ 3.43 mm under the laboratory condition. This model can be used to determine the best crystal diffraction rate region in the acousto-optic device.

Publication Source (Journal or Book title)

Yadian Yu Shengguang/Piezoelectrics and Acoustooptics

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