The holographic photopolymers property study based on the compound light initiator

In order to study a new holographic recording medium, this paper prepares a kind of holographic photoinduced polymer material based on a double monomer and a composite photoinitiator. Add different photoinitiator, such as red bengal (RB), titanium (irgacure 784, Ti) and a mixture of the two in the photopolymer materials, and then perform holographic exposure. We found that the compound photoinitiator improved the diffraction efficiency, light sensitivity, and transmittance to some extent compared with a single photoinitiator. Combined with the diffusion kinetics, we studied the effects of the two kinds of photoinitiators on the photoinduced polymers, and the ratio of the composite photoinitiators was optimized. The holographic parameters such as diffraction efficiency under different exposure intensities, different exposure time, different thickness and different wavelength are tested, it is shown that the exposure conditions have a great influence on the diffraction efficiency. At the same time, this material is sensitive to both green light and red light. The experiment results show that the reconstructed image is clear and bright, which indicates that the photoinduced polymer is suitable for dual-wavelength multiplexing holographic storage.