V. M. Fitio
Diffraction of a plane electromagnetic wave falling onto a thick hologram at the first-order Bragg angle at the non-linear recording conditions is analyzed using the coupled-wave equations. It is shown that, under the non-linear conditions, one can use double-wave approximation and the effective values for the modulated refractive index. Analytical dependences of the hologram diffraction efficiency on thickness are obtained. A possibility is revealed for using the effective value of the refractive index for the case of slight deviations from the Bragg angle.
Key words: grating, diffraction, coupled waves.
PACS: 42.25.Fx; 42.25.Pa
doi 10.3116/16091833/4/2/94/2003
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