Angular multiplex recording of data pages by dual-channel polarization holography

Abstract

Simultaneous recording of two data pages by dual-channel polarization holography is experimentally demonstrated. Two data pages are transferred as two orthogonal scalar wave components of a vector wave. The signal vector wave and reference beam are superposed on a polarization-sensitive medium. The two recorded data pages are simultaneously and independently reconstructed. Furthermore, holographic angular multiplex recording is performed.

Polarization-controlled images based on double-exposure polarization holography in an azobenzene liquid-crystalline polymer

“…Recently, polarization-controlled image operation has attracted considerable interest due to its important role in meta-holograms [8], optical logic gates [9], 2D spectral sensors [10], topological insulators [11], metamaterials [12], and polarization microscopy [13,14]. On the other hand, much attention has been paid to polarization holography for its unique properties and applications in optically storing, retrieving, and processing information [15][16][17][18][19][20][21]. Polarization holographic gratings can be written by two waves with mutually orthogonal linear or circular polarization in polarization-sensitive materials.…”

Shift Multiplex Recording of Four-Valued Phase Data Pages by Volume Retardagraphy

“…That recording technique was named "Retardagraphy" [7][8][9]. Retardagraphy is based on polarization holography [10][11][12] so that it is expected that multiplex recording is applicable by retardagraphy. In this paper, shift-multiplex recording is demonstrated by volume retardagraphy.…”

Hybrid polarization-angle multiplexing for volume holography in gold nanoparticle-doped photopolymer

“…Another developed multiplexing technique utilizing the polarization state of writing beams to perform polarization multiplexing could offer another degree of freedom for volume holographic recording with Bragg-based selectivity [4,13]. For its property of simultaneously reconstructing the polarization state of two beams, polarization multiplexing is also a potential technique for all-optical operations and image processing [14,15].…”

“…The diffraction efficiencies for LC and RC channels are about 0.12% and 0.15%, respectively. The quality of the reconstructed images was evaluated by the symbol error rate (SER), which is defined as the ratio of the number of error symbols and the total number of symbols in the reconstructed pattern [13]. The values of SER for the reconstructed images from LC and RC polarization recording beams are 3.81% and 4.46%, respectively.…”

“…The two reconstructed images recorded with RC and LC polarization are completely in superposition with these low-SER reconstructions, which could be further developed for all-optical image processing. The SER can also be improved by some error correcting methods [13].…”