Accession Number : ADP006762

Title :   Holographic Recording and Parametric Scattering Due to Orthogonally Polarized Beams in BaTio sub 3,

Corporate Author : OSNABRUECK UNIV (GERMANY F R) FACHBEREICH PHYSIK

Personal Author(s) : Holtmann, L. ; Kratzig, E. ; Goulkov, M. ; Odoulov, S. G.

Report Date : 22 MAY 1992

Pagination or Media Count : 4

Abstract : Among the variety of photorefractive crystals barium titanates distinguishes by its large nondiagonal electrooptic coefficient tau sub 42 = 16OOpm/V which enables efficient anisotropic diffraction. We report the first observation of anisotropic selfdiffraction from gratings arising in BaTiO3 when two copropagating orthogonally polarized waves (ordinary and extraordinary) impinge in the crystal at an arbitrary angle in the plane perpendicular to the optical axis and discuss the possible origins of this effect. A nominally pure BaTiO3 single crystal of dimensions 6.6 x 4.4 x 2.6mm is used. Two expanded beams of an argon laser (lambda = 515nm) intersect inside the sample with the c-axis directed normally to the plane of incidence (Fig. 1); both beams have nearly equal intensities (total intensity approx. 6.5kWM-2).

Descriptors :   *HOLOGRAPHY, ANGLES, ARGON, COEFFICIENTS, CRYSTALS, DIFFRACTION, ELECTROOPTICS, INTENSITY, SINGLE CRYSTALS, BARIUM TITANATES, LIGHT SCATTERING, REFRACTION, LASER BEAMS, SYMPOSIA, GRATINGS(SPECTRA), SYMPOSIA.

Subject Categories : Optics
      Holography

Distribution Statement : APPROVED FOR PUBLIC RELEASE