| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 739621 | Optics & Laser Technology | 2012 | 4 Pages |
The near stoichiometric LiNbO3 crystals co-doped with ZrO2 and Fe2O3 have been grown from a Li-rich melt (Li/Nb=1.38, atomic ratio) by the Czochralski method in air atmosphere at the first time. The OH− absorption and UV–vis absorption spectra were characterized to investigate the defect structure of the crystals. The appearances of the 3479 cm−1 absorption peak and 358 nm absorption edge manifest that the composition of the grown crystal is close to the stoichiometric ratio. The blue holographic properties were also measured by the two-wave coupling experiments. As a result, in the near stoichiometric Zr:Fe:LiNbO3 crystals, photorefractive response speed, recording sensitivity, and two-wave coupling gain coefficient are significantly enhanced. Meanwhile, the high saturation diffraction efficiency is still maintained. These findings prove that the material of near stoichiometric Zr:Fe:LiNbO3 crystals are a promising candidate for blue photorefractive holographic recording.
► The near stoichiometric Zr:Fe:LiNbO3 crystals have been grown from a Li-rich melt at the first time. ► The excellent two-wave coupling properties have been obtained at 488 nm wavelength in the near-stoichiometric Zr:Fe:LiNbO3 crystal. ► The near-stoichiometric Zr:Fe:LiNbO3 crystal is a promising candidate as a blue photorefractive material with a outstanding performance.
