Holographic gratings in pure and Mg-doped near-stoichiometric LiTaO<sub>3</sub> induced by deep-ultraviolet light

F. Juvalta; Ph. Dittrich; Germano Montemezzani; M. Jazbinsek; Peter Günter; Shunji Takekawa; Kenji Kitamura

doi:10.1117/12.676517

9 June 2006 Holographic gratings in pure and Mg-doped near-stoichiometric LiTaO₃ induced by deep-ultraviolet light

F. Juvalta, Ph. Dittrich, Germano Montemezzani, M. Jazbinsek, Peter Günter, Shunji Takekawa, Kenji Kitamura

Proceedings Volume 6252, Holography 2005: International Conference on Holography, Optical Recording, and Processing of Information; 62520A (2006) https://doi.org/10.1117/12.676517
Event: Holography 2005: International Conference on Holography, Optical Recording, and Processing of Information, 2005, Varna, Bulgaria

Abstract

Interband photorefractive gratings induced by deep ultraviolet light at λ_UV = 257 nm are investigated in pure and Mg-doped near-stoichiometric LiTaO₃. By controlling the stoichiometry, the response time and dynamic range of the interband photorefractive effect can be very much improved. Measured time constants are in the order of a few tens of milliseconds for UV light intensities of about 100 mW/cm². Further, we report that Mg doping of near-stoichiometric LiTaO₃ increases the grating response rate by a factor of 50 compared with the one in undoped crystals. In Mg-doped near-stoichiometric LiTaO₃, quasi-fixing of holographic gratings with UV light and nondestructive readout in the visible has been observed. These quasi-fixed gratings are written in the deep traps of the crystal.

Citation Download Citation

F. Juvalta, Ph. Dittrich, Germano Montemezzani, M. Jazbinsek, Peter Günter, Shunji Takekawa, and Kenji Kitamura "Holographic gratings in pure and Mg-doped near-stoichiometric LiTaO₃ induced by deep-ultraviolet light", Proc. SPIE 6252, Holography 2005: International Conference on Holography, Optical Recording, and Processing of Information, 62520A (9 June 2006); https://doi.org/10.1117/12.676517

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