期刊
OPTICS COMMUNICATIONS
卷 248, 期 1-3, 页码 89-96出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.optcom.2004.12.002
关键词
thulium; stoichiometric; LiNbO3; holographic recording
类别
We have observed ultraviolet-induced visible absorption and performed two-color holographic recording at green, red, and near-infrared light in thulium doped near-stoichiometric LiNbO3 crystal. The diffraction efficiency and sensitivity of the recording process at all wavelengths are increased by ultraviolet gating light. Characteristics of recording in the visible are explained by a two-center model. Two-color recording in the near-infrared exhibits significant improvements of the fixed diffraction efficiency and the role of small polarons is discussed in the visible and near-infrared recording with ultraviolet sensitizing light. (c) 2004 Elsevier B.V. All rights reserved.
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