Flexible Image Reconstruction in the Orbital Angular Momentum Holography with Binarized Airy Lens

Abstract

The orbital angular momentum (OAM) holography has been marked a path to achieving ultrahigh capacity holographic information systems. However, the practical applicability of the OAM holography is limited by the complicated optical setup and unadjustable image intensity and position. Here, a decoding method is proposed by using a binarized phase map derived from an autofocusing Airy beam. By adjusting the parameters of the phase map, the position and intensity distribution of the reconstructed image become flexibly adjustable. In addition, the cross-talk between different image channels can be effectively reduced thanks to the abruptly autofocusing capability of the Airy beams. As a result, the quality and practicability of the OAM holography can be greatly enhanced.

Multiplexing Perfect Optical Vortex for Holographic Data Storage

“…In recent years, the utilization of optical vortices (OV) has gained significant attention as a new degree of freedom with infinite orthogonal states, propelling advancements in optical communication [7,8], optical sensors [9][10][11], and holographic data storage [12][13][14][15][16], etc. OV holography has demonstrated its capability to achieve remarkably high multiplexing density, presenting a promising approach to directly stpre data.…”

“…The topological charge of an optical vortex, which determines the number of twists in its phase distribution, can be used as a label for data pages [12]. By assigning different topological charges to individual data pages, multiple pages can be stored within a single hologram, effectively increasing the storage density [13,14]. Furthermore, the orthogonality of OAM modes allows for selectively addressing and retrieving specific data pages [15,16].…”