Growth and optical homogeneity investigations of Fe and Fe:Mn codoped LiNbO3 crystals

被引：0

作者：

Kar, S. ^{[1
]}

Verma, Sunil ^{[1
]}

Khan, M. S. ^{[2
]}

Bartwal, K. S. ^{[1
]}

机构：

[1] Raja Ramanna Ctr Adv Technol, Laser Mat Dev & Devices Div, Indore 452013, Madhya Pradesh, India

[2] SGSITS, Dept Appl Phys, Indore 452003, Madhya Pradesh, India

来源：

CRYSTAL RESEARCH AND TECHNOLOGY | 2009年 / 44卷 / 12期

关键词：

lithium niobate; Czochralski method; doping; photorefractive materials; DOPED LITHIUM-NIOBATE; NONSTOICHIOMETRIC DEFECTS; PHOTOREFRACTIVE MATERIALS; STORAGE; IONS;

D O I：

10.1002/crat.200900546

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

Lithium niobate (LiNbO3) crystals doped with Fe and Fe:Mn were grown by Czochralski technique. The doping concentrations of Fe and Mn were optimized. Transmission studies reveal broad absorption band centered at 488 nm. The UV cutoff observed for Fe doped LiNbO3 is 358 nm whereas for Fe:Mn codoped LiNbO3 is 352 nm. This decrease in UV cutoff for Fe and Mn codoped LiNbO3 compared to only Fe doped LiNbO3 is due to the increase in Li/Nb ratio. Optical homogeneity was assessed using conoscopy and birefringence interferometry. Dark and photo conductivity measurements prove that LiNbO3 is a negative photo conducting material. (C) 2009 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim

引用

页码：1303 / 1307

页数：5

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