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Spatial and temporal transformations of holograms recorded in second nonlinear material

2005; SPIE; Volume: 5642; Linguagem: Inglês

10.1117/12.567529

1996-756X

Yuri N. Denisyuk,

Optical and Acousto-Optic Technologies

A method of wavefronts cross-correlation by means of so-called Second-Harmonic-Generated Hologram (SHG hologram) is considered. According to this method the interference pattern of an object wave and a reference wave is recorded in nonlinear light-sensitive material using its second order. The SHG hologram generates the wave that forms the reconstructed image of the object without time delay in the moment when interfering wavefronts intersect the light-sensitive material, the frequency of the reconstructed wave being doubled in comparison with the frequency of the recorded waves. The expression that describes the electrical field of the reconstructed wave is deduced. Basing on this expression the methods for the construction of the image generated by SHG hologram are developed.