In this work we have studied fundamental passive and active parameters of new family of erbium and ytterbium doped zinc-silicate glasses with different doping concentration and ratio of erbium and ytterbium ions. Parameters as absorption coefficient, saturation of absorption, emission wavelength, fluorescence lifetime and up-conversion spectra were measured. The laser performance was studied in end-diode pumped configuration with hemispherical resonator. As an excitation source a 30W fiber coupled 975 nm laser diode in pulsed regime was used. Laser action was achieved with four different samples of zinc-silicate glasses on wavelengths ranging from 1540nm to 1570nm. The results were compared with the properties of commercially available phosphate glasses and previous zinc-silicate glass which have similar threshold energy corresponding to 3,3mJ and 3mJ respectively. Newly designed zinc-silicate glasses prepared under improved conditions showed substantially better optical and laser properties in comparison with the previously prepared samples.
Two-step field-assisted ion-exchanged waveguides have been fabricated on a glass substrate. The concentration profiles of the exchanged ions were measured with electron microprobe. The waveguides were characterized under scanning electron microscope and optical microscope for the investigation of burying structures. Guiding mode patterns were characterized with near-field measurement, where symmetric profiles were observed for the burying-type waveguide. The refractive index profiles were also measured with a modified end-fire coupling method. The relation between ion concentration profiles and index profiles were compared for the waveguides with different fabrication process.
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