Abstract
Broadband monolithic acousto-optic tunable filters that combine a piezoelectric transducer array and an acousto-optic interaction medium in a single crystal have been investigated. A linearly chirped acoustic superlattice with an optical tuning range of was formed by domain inversion in . -propagating longitudinal acoustic waves are excited in a crossed-field scheme by a rf field applied to the superlattice and couple collinearly propagating and optical modes. At and the spectral bandwidths (FWHM) were 1.54 and 2.3 nm, respectively. A relative conversion efficiency of and a maximum conversion efficiency of 51% were measured at .
© 2000 Optical Society of America
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