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Proceedings Paper

The Yb-doped aluminosilicate fibers photodarkening mechanism based on the charge-transfer state excitation
Author(s): A. A. Rybaltovsky; K. K. Bobkov; V. V. Velmiskin; A. A. Umnikov; I. A. Shestakova; A. N. Guryanov; M. E. Likhachev; M. M. Bubnov; E. M. Dianov
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Paper Abstract

We have studied the photodarkening effect in fiber preforms with an ytterbium-doped aluminosilicate glass core. The room-temperature stable Yb2+ ions formation in the glass matrix under both UV- and NIR-pumping irradiation was revealed by the method of absorption spectra analysis and the fluorescence spectroscopy technique. Comparative studies of preforms and crystals samples luminescence spectra, obtained under UV-excitation, were performed. A general mechanism of Yb2+ ions and aluminium oxygen-hole centers (Al-OHC) formation as a result of photoinduced process of Yb3+ ions excitation to "charge-transfer state" (CTS) was found for both Yb:YAG crystal and aluminosilicate glass.

Paper Details

Date Published: 7 March 2014
PDF: 12 pages
Proc. SPIE 8961, Fiber Lasers XI: Technology, Systems, and Applications, 896116 (7 March 2014); doi: 10.1117/12.2038226
Show Author Affiliations
A. A. Rybaltovsky, Fiber Optics Research Ctr. (Russian Federation)
K. K. Bobkov, Fiber Optics Research Ctr. (Russian Federation)
V. V. Velmiskin, Fiber Optics Research Ctr. (Russian Federation)
A. A. Umnikov, Institute of Chemistry of High-Purity Substances (Russian Federation)
I. A. Shestakova, POLYUS Research and Development Institute (Russian Federation)
A. N. Guryanov, Institute of Chemistry of High-Purity Substances (Russian Federation)
M. E. Likhachev, Fiber Optics Research Ctr. (Russian Federation)
M. M. Bubnov, Fiber Optics Research Ctr. (Russian Federation)
E. M. Dianov, Fiber Optics Research Ctr. (Russian Federation)


Published in SPIE Proceedings Vol. 8961:
Fiber Lasers XI: Technology, Systems, and Applications
Siddharth Ramachandran, Editor(s)

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