Effect of recording angles on the Bragg mismatch of photopolymer hologram

2003 ◽  
Author(s):  
Mingju Huang ◽  
Huawen Yao ◽  
Zhongyu Chen ◽  
Lisong Hou ◽  
Fuxi Gan
Keyword(s):  
Bragg Mismatch

Effect of pH on the holographic properties of Al2O3 nanoparticle dispersed acrylate photopolymer

2014 ◽  
Vol 28 (11) ◽  
pp. 1450076 ◽  
Author(s):  
Yun-Xi Li ◽  
Chun-Liu Li ◽  
Ming-Ju Huang
Keyword(s):  
Refractive Index ◽  
Polyvinyl Alcohol ◽  
Diffraction Efficiency ◽  
Refractive Index Modulation ◽  
High Definition ◽  
Effect Of Ph ◽  
Nano Fluid ◽  
Al2o3 Nanoparticle ◽  
Bragg Mismatch ◽  
Index Modulation

Several different pH of Al 2 O 3 nano-fluid were prepared using dispersant and doped into polyvinyl alcohol (PVA)/acrylamide (AA) based photopolymers where the photopolymers were exposed with 647 nm Ar + Kr + laser to study its holographic properties. The research shows that the incorporation of Al 2 O 3 nanoparticles (NPs) improves the holographic characteristics of sample, where the pH has an effect to the dispersion of Al 2 O 3 NPs in the photopolymer. When the pH of Al 2 O 3 nano-fluid is about 7, the diffraction efficiency of the sample can be raised to 93.8%, the maximum refractive index modulation can be increased to 2.28×10-3, the shrinkage can be depressed to 0.8%, the Bragg mismatch is 0.04°, and the concentration of 10 nm Al 2 O 3 nano-fluid modified by high definition (HD) dispersant must be 1.02×10-3mol⋅L-1.

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