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 9
Fractal-kinetic rate coefficients determined as functions of dose rate Ď by fitting [48] growth curves comprising induced losses at 1300 nm as functions of accumulated dose from ~7 Gy to ~104 Gy in four virgin samples (one curve for each dose rate) of the MM Ge-doped-silica-core fiber of [53]. The fractal first-order (open circles) and second-order (solid squares) fitting functions (described in detail in [48]) were employed here without taking into account a small population of dose-rate-independent (nondecaying) defects inferred to be copresent. When corrections were made to account for such nondecaying defect populations, the data points collapsed onto the slope-1 line almost perfectly. (Note that Figure 10 shows the similarly fitted curves for the corresponding SM fibers, each of which takes into account the non-decaying components.)
