Abstract
The photosensitivity to 248nm excimer laser radiation of Er-doped Schott IOG-1 phosphate glass is presented. The photosensitive mechanism is investigated by employing a grating recording process. Index changes of up to ~2.0x10(-3) were measured in silver ion-exchanged samples using diffraction efficiency measurements; whereas changes of only ~10(-5) were measured for non-ion-exchanged samples. Absorption measurements allowed the identification of specific color center bands, which were attributed to the glass matrix and to the silver ions. Investigation of the exposed ion-exchanged glass using scanning electron microscopy and energy dispersive x-ray microanalysis revealed that in addition to the color centers formed, silver ion migration and ionization contribute significantly to the UV-induced index changes.
Highlights
13. Schott Glass datasheets for IOG-1 glass“UV transmission and radiation-induced defects in phosphate and fluoridephosphate glasses,” J
Er-doped phosphate glasses are promising host materials for the fabrication of high-gain waveguide and fibre lasers and amplifiers operating in the 1.5μm band
We found that an index change occurs in both cases, accompanied by strong photodarkening, indicating significant defect formation
Summary
“UV transmission and radiation-induced defects in phosphate and fluoridephosphate glasses,” J. U. Kreibig, “Electronic properties of small silver particles: the optical constants and their temperature dependence,” J. D.Moncke, D.Ehrt, “Irradiation induced defects in glasses resulting in the photoionization of polyvalent dopants,” Opt. Mat.
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