Thermal and Optical Properties of ${\hbox {Yb}}^{3+}$- and ${\hbox {Nd}}^{3+}$-Doped Phosphate Glasses Determined by Thermal Lens Technique
| Autor: | D.N. Messias, Maria José Valenzuela Bell, Tomaz Catunda, Carlos Jacinto |
|---|---|
| Rok vydání: | 2007 |
| Předmět: |
Materials science
Absorption spectroscopy business.industry Analytical chemistry Condensed Matter Physics Thermal diffusivity Atomic and Molecular Physics and Optics Phosphate glass Optics Thermal conductivity Heat generation Quantum efficiency Electrical and Electronic Engineering business Temperature coefficient Optical path length |
| Zdroj: | IEEE Journal of Quantum Electronics. 43:751-757 |
| ISSN: | 0018-9197 |
| DOI: | 10.1109/jqe.2007.902381 |
| Popis: | In this work, we study the thermal and optical properties of ion-doped phosphates glasses using the thermal lens (TL) technique. Three samples were characterized: Nd3+-doped Q-98; Nd3+-doped Q-100; and Yb3+-doped QX. We report multiwavelength TL measurements for a more accuracy determination of the fluorescence quantum efficiency and temperature coefficient of the optical path length change (ds/dT). In Nd-doped glasses, it was carried out using four discrete excitation wavelengths (between 514 and 872 nm) chosen to match with the ion absorption lines. In Yb-doped glass, the spectrum of heat generated along the Yb3+ transition (2 F 5/2rarr2 F 7/2) was obtained. In addition, parameters as thermal diffusivity and conductivity, thermal loading, etc were achieved. The advantages to obtain fluorescence quantum efficiency using the TL technique, mainly in Yb3+ doped materials, which are normally overestimated due to radiation trapping effect, are presented. The accuracy knowledge of these parameters is very important for design of high-power solid-state lasers, since these properties are directly related to the heat generation. |
| Databáze: | OpenAIRE |
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