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Proceedings Article

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

[+] Author Affiliations
T. Arai, K. Ichii, S. Tanigawa, M. Fujimaki

Fujikura Ltd. (Japan)

Proc. SPIE 7914, Fiber Lasers VIII: Technology, Systems, and Applications, 79140K (February 10, 2011); doi:10.1117/12.879800
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From Conference Volume 7914

  • Fiber Lasers VIII: Technology, Systems, and Applications
  • Jay W. Dawson
  • San Francisco, California, USA | January 22, 2011

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.

© (2011) COPYRIGHT Society of Photo-Optical Instrumentation Engineers (SPIE). Downloading of the abstract is permitted for personal use only.
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 (February 10, 2011); doi:10.1117/12.879800; http://dx.doi.org/10.1117/12.879800


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