France Telecom

Centre National De La Recherche Scientifique

Ecole Normale Superieure De Cachan

Eric Toussaere

Joseph Zyss

Jôseph Zyss

Sophie Brasselet

The invention concerns a method for optical recording of data on a photosensitive storage medium, characterized in that the data are encoded according to different possible states for the various components of a non-linear susceptibility tensor of the photosensitive medium and it consists in irradiating simultaneously at least a point of said support with write beams whereof the polarization is controlled for optical recording of a given non-linear susceptibility tensor on the photosensitive medium.

Method for optical data recording and reproducing

The invention concerns a method for photographic recording a spatial distribution of linear and/or non-linear optical properties in a polymer material which consists in irradiating the material to modify the orientation of its molecules. The irradiation direction is perpendicular or oblique relative to the propagation direction(s) of the scanning beams.

Method for photographic recording of at least a linear and/or non-linear optical property a structure comprising at least a photosensitive molecular material

The modulator includes a TE.revreaction.TM converter (3) between two electro-optical modulators (1, 2). The coupler includes two directional couplers interconnected via branches each including a TE.revreaction.TM converter. Another electro-optical component includes a light guide that is folded and metallization that extends at least over two juxtaposed portions of light guide.

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Chatillon, France

Eric Toussaere