Effect of thermal polymerization temperature and time of PQ/PMMA on the holographic data storage

Automated experimental platform for preparing PQ/PMMA

“…By adjusting the aperture diameter of the aperture diaphragm, interference circles with a diameter of 3 mm are formed on the polymer surface. The diffraction efficiency of materials is shown in formula (1.1) [4] , where I+1 and I0 are the first-order diffraction light after the light passes through the polymer and the transmitted light intensity irradiated on the polymer surface, respectively, η is the diffraction efficiency of the prepared polymer grating. The test results indicate that compared with the manually made PQ/PMMA materials, the materials prepared in the automated room have better stability and faster response time.…”

“…Polymethyl methacrylate (PQ/PMMA) photoinduced polymers doped with phenanthiquinone have attracted the attention of many researchers due to their good optical properties, simple preparation process, cheap price, controllable thickness and long storage time. However, the commercial application of PQ/PMMA materials is limited due to the low diffraction efficiency and poor stability [2] . At present, the prepared PQ/PMMA is basically made by hand, and its repeatability is poor, the materials prepared by different people and different environments are different, and the uniformity of the materials is poor, and the optical properties of different positions on the same piece of material are different.…”

Dual-channel polarization multiplexing based on linearly polarization holography

“…In the recording stage, the shutters SH1 and SH2 are opened, and the wave emitted from the laser is uploaded to the 4-level amplitude image via SLM, which is the signal wave. After passing through two 4f optical systems, it interferes with the reference wave in the polarizationsensitive media PQ/PMMA [4][5] . In the reconstruction stage, the shutters SH1 and SH3 are opened, and the reconstruction reference wave is diffracted inside the PQ/PMMA to reconstruct the hologram.…”