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Proceedings Paper

Gamma-radiation-induced photodarkening in ytterbium-doped silica glasses
Author(s): T. Arai; K. Ichii; S. Tanigawa; M. Fujimaki
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Paper Abstract

Photodarkening phenomenon in ytterbium (Yb)-doped silica glasses was experimentally investigated by measurements such as electron spin resonance (ESR), X-ray absorption fine-structure (XAFS), and optical transmittance. A predominant increase of Al-oxygen hole center (OHC) was observed for Al-Yb co-doped silica glasses both by the incidence of pump light and by gamma-ray irradiation. It was also recognized that the optical transmission loss similarly increased in both cases. These results indicate that the formation of Al-OHC is the prime cause of the excess loss induced by photodarkening. XAFS measurement indicated that the second-nearest-neighbor atoms around Yb may be related to the mechanism of photodarkening phenomenon.

Paper Details

Date Published: 10 February 2011
PDF: 6 pages
Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79140K (10 February 2011); doi: 10.1117/12.879800
Show Author Affiliations
T. Arai, Fujikura Ltd. (Japan)
K. Ichii, Fujikura Ltd. (Japan)
S. Tanigawa, Fujikura Ltd. (Japan)
M. Fujimaki, Fujikura Ltd. (Japan)

Published in SPIE Proceedings Vol. 7914:
Fiber Lasers VIII: Technology, Systems, and Applications
Jay W. Dawson, Editor(s)

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