Improved blue photorefractive properties of near-stoichiometric LiNbO3:Mn:Fe:Zr crystal

✍ Scribed by Chao Xu; Chunhui Yang; Yang Mo; Yijie Wang; Liang Sun; Liangcai Cao; Yuheng Xu

• Publisher: John Wiley and Sons
• Year: 2010
• Tongue: English
• Weight: 145 KB
• Volume: 45
• Category: Article
• ISSN: 0232-1300
• DOI: 10.1002/crat.201000383

✦ Synopsis

Near-stoichiometric LiNbO 3 single crystal tri-doped with ZrO 2 , MnO and Fe 2 O 3 was grown from Li-riched melt by Czochralski method. The defect structures and composition of these crystals were analyzed by means of ultraviolet-visible and infrared transmittance spectra. The appearance of 3466 cm -1 peak in infrared spectra showed that the crystal grown from Li-riched melt was near stoichiometric. The photorefractive properties at the wavelength of 488 nm and 633 nm were investigated with two-beam coupling experiment, respectively. The experimental results showed that the response speed and sensitivity were enhanced significantly and the high diffraction efficiency was obtained at 488 nm wavelength. This manifested that near-stoichiometric LiNbO 3 :Mn:Fe:Zr crystal was an excellent candidate for holographic storage.