Title :
Stable oscillating nonlinear beams in square-wave-biased-photorefractives
Author :
Tosi-Beleffi, G.M. ; Presi, M. ; DelRe, E. ; Boschi, D. ; Palma, C.
Author_Institution :
Ist. Nazionale Fisica della Materia, Rome, Italy
Abstract :
Summary form only given. Optical micrometer sized beams in biased photorefractives self-trap in a transient regime, reaching steady-state by increasing the sample conductivity. We investigate a fundamentally different stabilization process connected to beam behaviour in a non-stationary external bias field. We study beam evolution in the presence of an alternating field in centrosymmetric potassium-lithium-tantalate-niobate (KLTN).
Keywords :
electro-optical effects; lithium compounds; optical self-focusing; optical solitons; photorefractive materials; potassium compounds; KLiTaO/sub 3/NbO/sub 3/; alternating field; beam behaviour stabilization; beam charge separation; beam evolution; beam self-trapping process; centrosymmetric (K,Li)(Ta,Nb)O/sub 3/; electric field polarity; electro-holographic effects; nonstationary external bias field; quadratic electro-optic response; slab solitons; square-wave-biased-photorefractives; stable oscillating nonlinear beams; Azimuth; Charge carrier processes; Conductivity; Diffraction; Gray-scale; Nonlinear equations; Nonlinear optics; Optical beams; Optical modulation; Solitons;
Conference_Titel :
Lasers and Electro-Optics, 2001. CLEO '01. Technical Digest. Summaries of papers presented at the Conference on
Conference_Location :
Baltimore, MD, USA
Print_ISBN :
1-55752-662-1
DOI :
10.1109/CLEO.2001.948005
