| Autor: |
Hamad, Abdulatif Y., Wicksted, James P. |
| Předmět: |
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| Zdroj: |
Journal of Applied Physics; 3/15/2005, Vol. 97 Issue 6, p063102, 8p, 1 Diagram, 2 Charts, 13 Graphs |
| Abstrakt: |
We report a systematic study of grating formation in which the Pr2O3 concentration [Pr2O3] in sodium-magnesium-aluminosilicate glasses is varied from 0.5 to 5 mol %. The grating kinetics is reported as functions of the [Pr2O3] and the write-beam irradiance. The maximum persistent change in the index of refraction was 1×10-5. The persistent change in the index of refraction initially decreased linearly as a function of the [Pr2O3] and showed a limiting behavior at the highest [Pr2O3]. No appreciable transient change in the index of refraction, Δntran, was measured. This was attributed to the low probability of the multiphonon relaxation of the 3P0 level of the Pr3+ ions as determined through fluorescence measurements. The results of this study are consistent with a recently developed small modifier diffusion model. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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