The ways to modify the exchange of energy in a photorefractive crystal at equal optimized coupling constant were discussed. A model for four-wave interaction using the linearized theory based on Kukhtraev's equation was considered. It was shown that the optimized grating continuously gave rise to power transfer for a great range in the values of the external field and period grating.
Bibliographical noteFunding Information:
A.R. Salazar acknowledges the financial support of the Universidad Pontificia Bolivariana of Medellı́n, Colombia and gratefully acknowledges Prof. Ilia Mikhailov for many technical discussions. J.E. Rueda acknowledges the financial support of COLCIENCIAS-BID, Colombia.
- Higher diffraction orders
- Spatial harmonics