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Electric-field multiplexing of volume holograms in paraelectric crystals

机译:顺电晶体中体积全息图的电场多路复用

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Electric-field multiplexing (EFM) results from the tuning of the effective wavelength of the light beam inside a photorefractive crystal. This tuning results from the application of an external electric field to the crystal during holographic recording. We demonstrate the high Bragg selectivity of this multiplexing technique in paraelectric crystals and compare it with the selectivity obtained in the ferroelectric phase. The effects of the two major physical parameters of working in the paraelectric phase, the temperature and the external electric field applied during the writing stage, are investigated. Experimental results of the EFM of three image-bearing holograms recorded in reflection geometry are presented along with a qualitative analysis of the Bragg selectivity in paraelectric crystals.
机译:电场多路复用(EFM)由光折射晶体内部光束的有效波长的调整产生。这种调谐是由于在全息记录期间向晶体施加外部电场而产生的。我们在顺电晶体中证明了这种多路复用技术的高布拉格选择性,并将其与在铁电相中获得的选择性进行了比较。研究了在顺电阶段工作的两个主要物理参数,温度和在写入阶段施加的外部电场的影响。给出了反射几何中记录的三个带有图像的全息图的EFM实验结果,以及对顺电晶体中布拉格选择性的定性分析。

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