Abstract
Germanium oxygen deficient centers (GODC) are the most widespread defects in the molecular network of germanosilicate glasses. UV laser induced photodecomposition of GODC plays a key role for the effect of photosensitiviy of germanosilicate glasses [1,2]. This effect involves absorption of light by GODC, photochemical modification of defects and even density of glass, and, as a result, the change of refractive index as high as 10-3-10-2 [3,4]. The UV absorption band of GODC at 242 nm corresponds to the S0—S2 transition (Fig. 1). Concentration of GODC is controlled by glass and fiber fabrication conditions [4], and may amount to as much as NGODC = 1020 cm-3.
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Bagratashvili, V., Tsypina, S.I., Chernov, P.V., Rybaltovskii, A., Zavorotny, Y.S. (2000). ONE- AND TWO-QUANTUM UV PHOTO-REACTIONS IN PURE AND DOPED SILICA GLASSES. 2. GERMANIUM OXYGEN DEFICIENT CENTERS (GODC).. In: Pacchioni, G., Skuja, L., Griscom, D.L. (eds) Defects in SiO2 and Related Dielectrics: Science and Technology. NATO Science Series, vol 2. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-0944-7_18
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DOI: https://doi.org/10.1007/978-94-010-0944-7_18
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