Title :
Self-organization of the photorefractive scattering in KNbO3 in a hexagonal spot array
Author :
Banerjee, P.P. ; Yu, H.L. ; Kukhtarev, N.
Author_Institution :
Dept. of Electr. & Comput. Eng., Alabama Univ., Huntsville, AL, USA
Abstract :
In this paper we describe a new nonlinear phenomenon observed during scattering of a single Ar laser beam in a photorefractive KNbO 3:Fe crystal. A vertically polarized laser beam initially scatters in a cone angle behind the crystal, and later rearranges in a hexagonal spot array. These six spots may rotate about the center, and the rotation speed and the intensity ratio of the peripheral spots to the central spot are dependent on the intensity and diameter of the incident beam
Keywords :
iron; laser beams; light polarisation; light scattering; nonlinear optics; photorefractive materials; potassium compounds; Ar; KNbO3 in; KNbO3:Fe; cone angle; hexagonal spot array; incident beam; intensity ratio; nonlinear phenomenon; photorefractive KNbO3:Fe crystal; photorefractive scattering; rotation speed; self-organization; single Ar laser beam; vertically polarized laser beam; Argon; Gratings; Holography; Laser beams; Light scattering; Optical refraction; Optical scattering; Optical variables control; Photorefractive effect; Polarization;
Conference_Titel :
Nonlinear Optics: Materials, Fundamentals, and Applications, 1994. NLO '94 IEEE
Conference_Location :
Waikoloa, HI
Print_ISBN :
0-7803-1473-5
DOI :
10.1109/NLO.1994.470860
