铈铁掺杂铌酸锂晶体光折变性能的研究  

Photorefractive properties of Ce:Fe:LiNbO_3 crystals

作　　者：张欣[1] 徐朝鹏(指导)[1] 卢海涛[1] 佟建强 高洁[1] 王晓军[1] 

机构地区：[1]燕山大学信息科学与工程学院,河北省特种光纤与光纤传感重点实验室,河北秦皇岛066004

出　　处：《红外与激光工程》2015年第12期3718-3722,共5页Infrared and Laser Engineering

基　　金：河北省高等学校科学技术研究重点项目(ZD2010215);河北省自然科学基金(F2009000465);秦皇岛市科学技术研究与发展计划项目(201001A058)

摘　　要：对铈铁掺杂铌酸锂(Ce:Fe:Li Nb O_3)晶体进行氧化、还原处理。通过红外光谱、紫外可见吸收光谱测试了晶体样品的组成和缺陷结构。采用透射光斑畸变法测试了晶体样品的抗光损伤能力,结果表明:生长态晶体比还原态晶体的抗光致散射能力基本上高一个数量级,氧化态的晶体要比还原态的晶体高两个数量级。采用二波耦合实验测试了晶体样品的光折变性能,结果表明:从氧化到生长再到还原态,衍射效率逐渐降低,响应时间缩短,光折变灵敏度增加,动态范围逐渐降低。Ce：Fe：LiNbO3 crystals were processed composition and defect structure were analyzed by with oxidized and reduced method. The crystal the Ultraviolet （UV）-Visible （Vis） absorption and Infrared （IR） transmission spectroscopy. The photo-damage resistance ability of the samples was observed by straightly observing the transmission facula distortion method. The results show that the photo-damage resistance ability of sample with growth state is essentially one magnitude higher than one with reduced state, and photo-damage resistance ability of sample with oxidation state is two magnitudes higher than one with reduced state. The photorefractive properties of the samples are experimentally studied by using the two-wave coupling method. The results of the two-wave coupling experiments show that from oxidation state to growth state to reduction state of the samples, the diffraction efficiency decrease but the response time is shorten and the photorefractive sensitivity increase while the dynamic range decrease slowly.

关 键 词：Ce:Fe:LiNbO3 氧化还原 光谱 抗光散射 光折变性能 

分 类 号：O734.1[理学—晶体学]