1,720,972 research outputs found
Erbium incorporation in LiNbO3 crystals obtained by ion-exchange process
No full textErbium local doping of LiNbO3 single crystal by the ion-exchange has been performed. The role of the process parameters such as exchange time and temperature, crystal cut direction, composition and heating rate of the Er ions liquid source has been investigated by means of secondary ion mass spectrometry, X-ray diffraction and micro-lumi- nescence techniques. A theoretical model has been presented for describing the ion-exchange process and has been successfully applied to fit the experimental data. We have demonstrated that the method is suitable for Er-doping of LiNbO3 crystals, with the possibility of tailoring the optical performances of the material through the preparation parameters
Synthesis and structural characterization of trimetallic perovskite-type rare-earth orthoferrites, LaxSm1-xFeO3
No full textSearch for impurity phases of Nd3+: YVO4 crystals for laser and luminescence applications
No full text
Search of impurities phases of pure and doped YVO4 crystals for laser and luminescence applications
No full textMicroanalytical study of Er-doped LiNbO3 crystals obtained by Er-Li ion exchange
No full textErbium-doped lithium niobate (LiNbO3) crystals were produced by Er±Li ion exchange (IE) process. The role of the process parameters such as exchange time and temperature, crystal cu direction,composition and heating rate of the Er ions liquid source was investigated by means of secondary ion mass spectrometry, X-ray diffraction (XRD) and microluminescence techniques. We demonstrated that Er effective diffusion coefficient is two orders of magnitude greater with respect to the thermal diffusion from Er film. We observed that no Li deficient phase can be achieved and that active Er ions are homogeneously incorporated in the substrate. The method is suitable for Er doping of LiNbO3 crystals at relative low temperature (from 570°C to 650°C)
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