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Monolithic bulk shear-wave acousto-optic tunable filter

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2 Author(s)
Gnewuch, H. ; Sch. of Phys. Sci., Univ. of Kent, Canterbury, UK ; Pannell, C.N.

We demonstrate a monolithic bulk shear-wave acousto-optic tunable filter combining a piezoelectric transducer array and the acoustic interaction medium in a single crystal. An X-propagating acoustic longitudinal wave is excited in the "crossed-field" scheme by an RF-E/sub y/-field in a chirped acoustic superlattice formed by domain-inversion in lithium niobate (LiNbO/sub 3/). The acoustic longitudinal wave is efficiently (97.5%) converted at a mechanically free boundary into a Y-propagating acoustic slow-shear wave that couples collinearly propagating e- and o-polarized optical waves. A relative conversion efficiency of 80%/W was measured at 980 nm.

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Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on  (Volume:49 ,  Issue: 12 )