在光致聚合物中采用脉冲激光记录全息图的记录条件研究

在蓝绿敏光致聚合物材料中,用532 nm激光器作为光源,在等光强不同重复频率和等重复频率不同光强条件下分别进行全息记录,用红光进行动态读出,获得两种记录条件下的衍射效率曲线.实验结果表明,在近连续脉冲光下进行全息记录时,较低重复频率和较低光强的脉冲激光能够明显提高光致聚合物光栅的最高衍射效率,通过优化脉冲激光的重复频率和平均光强,可以在材料中记录衍射效率最高的全息图.

Diffraction Efficiency of Volume Holograms Recording in Photopolymer Films with Quasi Continuous Exposures

The influence of the pulse repetition frequency and average writing intensity on volume holograms recorded in photopolymer films was studied.A pulsed diode-pumped YAG laser(532-nm wavelength) was used as recording light source.Volume holograms were recorded with different pulse repetition frequencies under the same average writing intensity,and different average intensities at the same repetition frequency.The diffraction efficiencies were measured real-time during the holographic grating formation.Experime...