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研究光折变多重全息图分批热固定方法,依据热固定的基本理论模型研究离子补偿后的全息电子光栅在分批记录和定影过程中的光擦除特点。引入批间光擦除时间常数对多重全息图分批热固定的批间擦除特性进行定量描述,给出了测量批间光擦除时间常数的实验方法,并测得实际晶体的批间光擦除时间常数。研究结果表明,被记录光激发的已定影全息图的获陷电子对其离子光栅的屏蔽作用,使得多重全息光栅的各批间光擦除时间常数τF远大于每批内光栅间的擦除时间常数τE,实验结果与理论预期一致。证实了批间光擦除时间常数与批内光擦除时间常数的差异是采用分批存储热固定技术高效存储热固定高密度全息图的基本依据。
The method of batch thermocompression of photorefractive multi-hologram is studied. According to the basic theoretical model of heat fixation, the optical erasure characteristics of the ion-compensated holographic electronic grating during batch recording and fixing process are studied. The batch erase time constant is introduced to quantitatively describe the inter-batch erase characteristics of batch hologram fixed heat setting. The experimental method for measuring the erase time constant between batches is given, and the actual inter-batch light Erase the time constant. The results show that the trapped electron of the fixed hologram excited by the recording light has a shielding effect on the ion grating so that the time constant of the optical erasing time among the multiple holographic gratings is much larger than the erasing time Constant τE, the experimental results are in line with the theoretical expectation. It is confirmed that the difference between the time constant of batch photoetching and the batch time photoetching time constant is the basic basis for the efficient storage of high temperature hologram with heat storage in batch storage.