Abstract Recording the volume holograms in LiTaO3 with high intensity (up to 11 GW/cm2) nanosecond pulses was considered in this study. A very compact Nd:YVO4 laser with the pulse duration of 1.7 ns at λ = 530 nm was used for the recording. Four congruent LiTaO3 samples with the iron contents ranging from 3.3 × 1017 to 700 × 1017 см−3 were selected for the experimental observation. In the LiTaO3:Fe crystal (CFe = 66 × 1017 см−3), the microhologram recording by the single nanosecond pulse with as high refractive index change as 7.6 × 10−4 was carried out. In the same sample, the maximum refractive index change of 29.8 × 10−4 was reached under the exposition to a train of four pulses. The qualitative charge transport model taking into account a recording with high intensity nanosecond pulses was proposed.

中文翻译：

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LiTaO3:Fe 晶体中的两个光子全息记录，具有 532 nm 的高强度纳秒脉冲

摘要 本研究考虑使用高强度（高达 11 GW/cm2）纳秒脉冲记录 LiTaO3 中的体积全息图。一个非常紧凑的 Nd:YVO4 激光器在 λ = 530 nm 处的脉冲持续时间为 1.7 ns，用于记录。选择了铁含量从 3.3 × 1017 到 700 × 1017 см−3 的四个全等 LiTaO3 样品进行实验观察。在 LiTaO3:Fe 晶体 (CFe = 66 × 1017 см−3) 中，通过具有 7.6 × 10−4 的高折射率变化的单个纳秒脉冲进行了微全息图记录。在同一样品中，在暴露于四个脉冲序列下达到了 29.8 × 10-4 的最大折射率变化。提出了考虑到高强度纳秒脉冲记录的定性电荷传输模型。