Fig. 1. Schematic illustration of holographic data storage.(a) Writing process. (b) Reading process.

Fig. 2. Comparison between traditional data storage and holographic data storage.

Fig. 3. Optical configuration of CHDSS.Photo detector and red laser are utilized to servo control and locate holograms. QWP: quarter wave plate; HVD: holographic versatile disc; DMD: digital micro mirror device, one kind of SLM; PBS: polarized beam splitter; DBS: dichroic beam splitter.

Fig. 4. Data page format in the CHDSS.

Fig. 5. The comparison between amplitude modulation and phase modulation.

Fig. 6. The complex amplitude data page and interference data page.(a) Data page. (b) Interference data page (IDP).

Fig. 7. Phase modulation of reference pattern for data page pattern.

Fig. 8. The phase demodulation histogram of four different data pages.

Fig. 9. The diagram of non-interferometric system for phase retrieval based on IFT algorithm.

Fig. 10. Convergent curves with different proportions of embedded phase data.