Study of optical elastic scattering in a quasiperiodically poled LiTaO3 crystal.

In this letter we report the experimental result on the study of light scattering in a one-dimensional quasiperiodically poled LiTaO₃ crystal. The infrared scattering signal in the crystal was upconverted into visible band by sum frequency with incident light, forming a set of coaxial conical second harmonic beam with a quasiperiodic ratio at the radius. The quasi-phase-matching significantly enhanced such a nonlinear interaction. The angular distribution of scattering light in crystal was extracted from the experimental result. This reveals a possible application of quasiperiodic structure on the study of light scattering. [ABSTRACT FROM AUTHOR]