Optical topographic technique to material characterization of photorefractive crystals

S. Bugaychuk, G. Mandula, L. Kovács, R. A. Rupp

Research output: Contribution to journalConference article


Nonlinear transmission wave-mixing problem in a photorefractive medium that include both local and non-local responses is solved not traditionally but with using a new variable namely the dynamic grating amplitude. The dynamics of the wave-mixing is described by a modified sine-Gordon equation that have soliton-like solutions for the dynamic grating amplitude. For the first time the solution for the grating amplitude distribution in a medium with complex response is obtained. The shape of the grating amplitude profile is determined only by the value of the non-local response in the steady state, and both by local and by non-local components of the response in a transient process. Complete analytical solutions with taking into consideration the complex medium response as well as the absorption in two-wave mixing are obtained. The described theoretical predictions can be a base for a novel topographical method to material characterization of photorefractive crystals that allows one to study contributions local and non-local components of the medium response more precisely.

Original languageEnglish
Article number60230J
JournalProceedings of SPIE - The International Society for Optical Engineering
Publication statusPublished - Dec 1 2005
Event10th International Conference on Nonlinear Optics of Liquid and Photorefractive Crystals - Alushta, Ukraine
Duration: Oct 3 2004Oct 8 2004


  • Four-wave mixing
  • Grating amplitude profile
  • Sine-gordon equation
  • Soliton-like solutions

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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