This paper reports on the spectroscopic properties of the 3H4 and 3F4 Tm3+ levels in a TZN glass host with a concentration range from 0.82 to 22 × 10^20 cm-3. Precise refractive index measurements are performed on five different wavelengths by the prism coupling method. JuddOfelt intensity parameters have been determined in order to obtain transition rate, branching ratio and radiative lifetime. Spectroscopic measurements show the most promising concentration for the 1.8¼m short cavity laser emission at 6.84 × 10^20 cm-3 Tm3+ with a 24% quantum efficiency and upper limit concentration of 11 × 10^20 cm-3 Tm3+. Energy transfer microparameters and critical ion distance are determined for both emission levels within the framework of diffusion-limited regime and dipoledipole interaction.
Spectroscopy and optical characterization of thulium doped TZN glasses
M Ferrari;
2010
Abstract
This paper reports on the spectroscopic properties of the 3H4 and 3F4 Tm3+ levels in a TZN glass host with a concentration range from 0.82 to 22 × 10^20 cm-3. Precise refractive index measurements are performed on five different wavelengths by the prism coupling method. JuddOfelt intensity parameters have been determined in order to obtain transition rate, branching ratio and radiative lifetime. Spectroscopic measurements show the most promising concentration for the 1.8¼m short cavity laser emission at 6.84 × 10^20 cm-3 Tm3+ with a 24% quantum efficiency and upper limit concentration of 11 × 10^20 cm-3 Tm3+. Energy transfer microparameters and critical ion distance are determined for both emission levels within the framework of diffusion-limited regime and dipoledipole interaction.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
