近化学计量比Zn:In:Fe:LiNbO_3晶体位相共轭性能和全息关联存储

PHASE CONJUGATION PROPERTIES AND HOLOGRAPHIC ASSOCIATIVE STORAGE OF NEAR STOICHIOMETRIC Zn:In:Fe:LiNbO_3 CRYSTALS

以K2O为助溶剂,采用顶部籽晶溶液生长法生长掺ZnO为3%(摩尔分数)和 Fe2O3为0.03%(质量分数),In2O3分别为1%(摩尔分数),2%,3%的3种近化学计量比Zn:In:Fe:LiNbO3(near stoichiometric Zn:In:Fe:SLN)晶体。测量了3种晶体的红外光谱、位相共轭反射率和响应时间。结果表明:3 种不同In3+浓度的 Zn:In:Fe:SLN 晶体的红外光谱中,分别出现3个新的OH-吸收峰3502,3503cm-1和3504cm–1。晶体的稳态位相共轭反射率分别达到192%,172%和140%,响应时间分别为3.8,3.2min和2.4min。以Zn:In:Fe:SLN晶体作为存储介质和位相共轭镜进行全息关联存储实验,在输出平面上得到关联输出的清晰的图象。分别以原物的50%和25%信息寻址,50%信息寻址的关联存储图像清晰完整;25%信息寻址的图像基本完整。

Three types of near stoichiometric Zn：In：Fe：LiNbO3 （Zn：In：Fe：SLN） crystal doped with 3% ZnO （in mole） and 0.03% Fe2O3 （in mass） and with 1% （in mole, the same below）, 2% and 3% In2O3 were grown by the top seeded solution growth method and using K2O as flux. The phase conjugation refractivity and phase conjugation time of the crystals were measured. The results show that in the infrared spectra, the OFF absorption peaks for the crystals with 1%, 2% and 3% In2O3 are located at 3 502, 3 503 and 3 504 cm^-1 Their steady phase conjugation refractivities are 192%, 172% and 140%, and the corresponding phase conjugation times are 3.8, 3.2 and 2.4 min, respectively. A holographic associative storage experiment was conducted using the Zn：In：Fe：SLN crystals as the storage media and a phase conjugation mirror, and the clear storage image was received by the output plane. When information was searched for based on 50% or 25% of the size of the original image, the image received was high quality for the size of 50%, and the storage image retained basic integrity for the size of 25%.