Holographic data storage in thin polymer films

Abstract

We present our results on polarization holographic data storage in thin azobenzene side chain polymers. Two different systems have been demonstrated: a read only system with red diode laser and a read&write system with green frequency doubled solid state lasers. Error free operation have been proved at 2.77 bit/µm 2 data density. We have also demonstrated enhanced security holographic storage by applying phase coded reference waves imaged onto the hololographic storage material. We also present the concept of extending the principle to multilayer holographic storage.

Diffraction efficiency improvement in high spatial frequency holographic gratings stored in PVA/AA photopolymers: several ACPA concentrations

“…When the material in which the interference pattern is stored is illuminated by the reference beams, a diffracted beam is observed that is an exact reproduction of the original wavefront. In the last decade holography has acquired great importance due to its numerous applications, for example, holographic interferometry to obtain information on the deformation of materials [4], in the manufacture of lenses [5,6] and holographic optical elements [7][8][9], or data encoding [10,11]. Moreover, holography can even be applied to manufacture solar concentrators [12] and in the field of medicine [13].…”

Influence of ACPA on the stability of holographic transmission gratings stored in photopolymers

“…Numerosos artistas han diseñado hologramas para posteriormente mostrarlos en exposiciones. También puede ser utilizada en interferometría holográfica para obtener información de propiedades de algunos materiales [6], en la fabricación de lentes [7] y elementos ópticos holográficos [8][9][10], o en la codificación de datos [11,12]. La holografía incluso puede aplicarse a la medida de la humedad relativa [13], a la fabricación de concentradores solares [14] y al campo de la medicina [15,16].…”