A Minireview of the Natures of Radiation-Induced Point Defects in Pure and Doped Silica Glasses and Their Visible/Near-IR Absorption Bands, with Emphasis on Self-Trapped Holes and How They Can Be Controlled
Figure 11
γ-ray-induced optical absorption bands attributable to metastable self-trapped holes in separate lengths of an aluminum-clad, low-OH, F-doped-silica-core optical fiber at 27°C in the dark. The short-wavelength spectra were recorded in situ using a 1 m length of fiber and a prism-based CCD-camera spectrometer [48]; whereas long-wavelength spectrum was recorded in situ using a 10 m length and an optical signal analyzer. Dose rates in rad/s and irradiation times in seconds are indicated in the figure. The dose delivered to the 10 m length was about the same as for the 960 s exposure of the 1 m length (note that the right-hand scale is expanded by a factor of 10). Figure from [48].
