Abstract
The paper is devoted to the theoretical and experimental investigation of acoustooptical tunable filters, based on quasicollinear geometry of light-sound interaction in tellurium dioxide (paratellurite) single crystal. This configuration uses the effect of strong acoustic anisotropy in paratellurite as well as peculiarities of acoustic wave reflections from the free boundary of the crystal. The mathematical approach for determination of optical, electrical and constructional parameters of the filters was developed. Several experimental acoustooptical filters intended for dense WDM networks operating in S, C and L-bands were designed and tested. The experimental data is in good agreement with theoretical ones.
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