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首次观察到了双掺杂LiNbO3:Fe:Cu晶体中的漂白效应,并利用该效应实现了非挥发性全息存储.不同于通常的双掺杂铌酸锂晶体中观察到的光色效应,LiNbO3:Fe:Cu中的光致吸收率的变化呈现漂白效应,即当该晶体被紫外光照射后对可见光的吸收减少.基于这种漂白效应,提出并实验研究了一种新的记录方案以实现非挥发性全息存储.该方案包括两束相干红光的记录以及均匀紫外光和单束相干红光的固定等两个主要过程.实验结果表明,怍为一种新的物理机制,漂白效应可以实现非挥发性全息存储并具有高记录灵敏度和低光致散射噪声等特点.
The bleaching effect of double doped LiNbO3: Fe: Cu crystals was observed for the first time and non-volatile holographic storage was achieved using this effect.Different from the photochromic effect observed in the usual double-doped lithium niobate crystals, the LiNbO3: The change of photoabsorption in Fe: Cu shows a bleaching effect, that is, the absorption of visible light decreases when the crystal is irradiated by ultraviolet light.On the basis of this bleaching effect, a new recording scheme is proposed and experimentally implemented to realize the non- Volatile holographic storage.The program consists of two main processes of recording two coherent red lights and fixing the uniform ultraviolet light and the single coherent red light.The experimental results show that 怍 is a new physical mechanism and the bleaching effect can be achieved Non-volatile holographic storage and has high recording sensitivity and low light-scattering noise and so on.