TITLE

Interdigital transducer method of acoustic beam steering for bulk wave acousto-optic Bragg cells

AUTHOR(S)
Palmieri, L.; Socino, G.; Verona, E.
PUB. DATE
September 1985
SOURCE
Applied Physics Letters;9/1/1985, Vol. 47 Issue 5, p463
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
A LiNbO3 acousto-optic Bragg cell is described, which uses an interdigital transducer deposited on the x surface of the crystal so as to excite longitudinal bulk acoustic waves along a direction almost normal to the surface itself. By a proper choice of the periodicity of the transducer electrodes, a frequency-dependent steering of the acoustic beam can be obtained, which allows the Bragg conditions to be satisfied over a wide range of frequencies. Results are reported relative to a cell operating in the frequency range 1.4–2.1 GHz, with a diffraction efficiency of approximately 2% per watt of acoustic power.
ACCESSION #
9818110

 

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