A.Yu. Belikov, N.N. Vyukhina, V.N. Zatolokin, P.E. Tverdokhleb, A.V. Trubetskoy, I.Sh. Steinberg, and Ju.A. Shepetkin (Russia)
Recording medium, multilayer memory, heterodyne detection
An automated optoelectronic system is presented in this article. We report experimental results on application of the two-beam laser technique for local recording and heterodyne detection of microgratings (microholograms) in X, Y, Z-space of volume recording media. Research was performed in iron-doped lithium niobate as well as in thick photopolymer materials. The typical size of a micrograting in X, Y, Z-axis is 0.941.369 m3 (the size depends on the laser wavelength, the numerical aperture of the microobjective and the medium refractive index). Characteristics of a single micrograting and of the micrograting matrix which was recorded at different depths of the recording medium are presented.
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