Abstract
Soda-lime silicate glasses doped with different percentages Of Er- and Yb- oxides were produced by melting, and bothplanar and channel waveguides were fabricated by diluted silver ion exchange. Their optical and spectroscopic propertieshave been investigated, and some results are reported here. The optical parameters such as refractive index, diffusion depthand number of modes were measured by rn-line technique. Absorption and fluorescence spectra were also measured;particular attention was focused on upconversion phenomena. The upconversion luminescence spectra of an ErIYb-activatedwaveguide were obtained by continuous-wave excitation at 514.5 nm, as a function of the excitation power. The weak
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