3-D holographic recording method and 3-D holographic recording system

Abstract

A method of 3D holographic recording by using a very simple optical system comprises: dividing a femto-second laser pulse into a plurality of light beams by a diffraction beam splitter (3), focusing four light beams selected from the divided plurality of light beam, controlling each optical phase of the selected four light beams by a phase retarder (8). and further focusing these four light beams into a sample (7′) comprised of a photosensitive material capable of multi-photon exposure so that the photosensitive material is exposed to the interference among the four light beams and multi-photon absorption in the sample (7′) is induced, thus recording a 3D phase hologram on the irradiated portion of the sample (7′).

Dependencies are inferred from the claim text.