Figure 2

(a) The setup of a holographic data storage system, (b) a general PSI to retrieve the signal phase, and (c) the proposed DFGSI-PSI and spatial light modulator (SLM), which encodes the 2D multi-level phase.

(a) The setup of a holographic data storage system, (b) a general PSI to retrieve the signal phase, and (c) the proposed DFGSI-PSI and spatial light modulator (SLM), which encodes the 2D multi-level phase.