Abstract
The spectroscopic properties of Er3+ ion in tellurite glass of molar composition 76TeO2∙10ZnO∙9.0PbO∙1.0PbF2∙3.0Na2O∙1.0Er2O3 was investigated experimentally. The three phenomenological intensity parameters Ωk (k = 2, 4, 6) were determined from the absorption spectral intensities using the Judd-Ofelt (J-O) theory. Several radiative properties such as spontaneous transition probabilities, fluorescence branching ratios and radiative life times were determined by using these intensity parameters. The special attention was attributed to the visible emissions that could be obtained by pumping using a blue laser diode. The stimulated emission cross-section and CIE chromaticity coordinates were calculated. The latter were used to evaluate green light emitting by Er:TZPPN glass. Subsequently, the stimulated emission cross-section, around 1.5 μm, was calculated from McCumber theory. Gain cross-section for laser transition 4I13/2→ 4I15/2 of Er3+-ions was obtained. In comparison with other Er-doped laser glasses, the calculated parameters show that Er:TZPPN glass satisfies the fundamental spectral condition for laser emission around 1.5 μm. Moreover the Raman gain coefficient of the present glass was obtained from Raman scattering experiments using 532 nm excitation [(532 nm Laser type Diode-pumped, solid state (DPSS)]. The developed glass showed the widest bandwidths of gain cross section from 249 to 1,106 cm−1.
Published Version
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