Abstract

The dynamics of holographic gratings recording and Bragg-matched optical erasure in nonlinear materials have been studied by several authors. This question still attracts much attention even now as we can judge from programs of several conferences and recent publications/2,3/. In this paper we study how the temporal evolution of the signal wave is changing when this wave is amplified holographically due to the beam coupling in photorefractive crystals. The solution of the well-known equations for single-trap band transport model /1/ is in the basis of our calculations. The same approach was used earlier to calculate the dynamics of self-diffraction for local-response medium and step-like onset of the pump beam intensity /4/ and gave rather good description of the experimentally observed dependences /5/. We generalize the technique to treat the mixed local/nonlocal response and consider the bell-shaped temporal envelope of the input signal and pump.

© 1993 Optical Society of America