Gamma-radiation-induced photodarkening in ytterbium-doped silica glasses

T. Arai; K. Ichii; S. Tanigawa; M. Fujimaki

doi:10.1117/12.879800

10 February 2011 Gamma-radiation-induced photodarkening in ytterbium-doped silica glasses

T. Arai, K. Ichii, S. Tanigawa, M. Fujimaki

Proceedings Volume 7914, Fiber Lasers VIII: Technology, Systems, and Applications; 79140K (2011) https://doi.org/10.1117/12.879800
Event: SPIE LASE, 2011, San Francisco, California, United States

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.

Citation Download Citation

T. Arai, K. Ichii, S. Tanigawa, and M. Fujimaki "Gamma-radiation-induced photodarkening in ytterbium-doped silica glasses", Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79140K (10 February 2011); https://doi.org/10.1117/12.879800

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