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在Mn∶Fe∶LiNbO3晶体中加入抗光折变元素铟,使用Czochralski法生长In∶Mn∶Fe∶LiNbO3晶体,并对晶体进行氧化还原处理,测试了晶体紫外-可见吸收光谱.结果表明:铟的掺入使晶体吸收边发生移动,生长态晶体吸收边稍向紫移,氧化处理晶体吸收边紫移程度较大,还原处理晶体吸收边红移.通过二波耦合实验,使用输出功率30 mW的He-Ne激光器进行单光写入与擦除实验,测试了晶体记录过程中的响应时间与擦除时间.研究结果表明:In3+的掺入可通过提高擦除时间与响应时间之比,较大地提高晶体的动态范围;用生长态摩尔分数1%的In∶Mn∶Fe∶LiNbO3晶体进行擦除时,衍射效率达到30%,衍射效率不随时间变化.
In the Mn: Fe: LiNbO3 crystal, anti-photorefractive element indium was added, and Czochralski method was used to grow In:Mn:Fe:LiNbO3 crystal, and the crystal was redox-treated to test its UV-Vis absorption spectrum. The results showed that indium , The absorption edge of the growing state shifts slightly to the purple, the violet shift of the absorption edge of the oxidation processing crystal is larger, and the red edge of the absorption edge of the reduction processing crystal is red shifted. By the two-wave coupling experiment, the output power of 30 mW He-Ne laser was used to write and erase single-shot experiment, and the response time and erase time of the crystal recording process were tested.The results show that: In3 + can be doped by increasing the ratio of erase time to response time The earth enhances the dynamic range of the crystal; when eclipsed with 1% growth of In: Mn: Fe: LiNbO3 crystal, the diffraction efficiency reaches 30%, and the diffraction efficiency does not change with time.