Temperature dependent absorption and emission spectra of Tm:CaF2
| Autor: | Malte C. Kaluza, J. Pejchal, Jörg Körner, Joachim Hein, Jürgen Reiter, Akira Yoshikawa |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Doping Physics::Optics chemistry.chemical_element 02 engineering and technology 021001 nanoscience & nanotechnology Laser 01 natural sciences 7. Clean energy Fluorescence Molecular physics Electronic Optical and Magnetic Materials law.invention 010309 optics Thulium chemistry McCumber relation law 0103 physical sciences Fluorine Emission spectrum ddc:620 0210 nano-technology Absorption (electromagnetic radiation) |
| Zdroj: | Optical materials express 10(9), 2142 (2020). doi:10.1364/OME.393890 |
| ISSN: | 2159-3930 |
| Popis: | We present Emission and absorption cross sections of thulium doped calcium fluoride (Tm:CaF2) in the visible to short wave infrared (SWIR) wavelength range for temperatures between 80 K and 300 K. For spectral regions of high and low absorption the McCumber relation and the Fuchtbauer–Ladenburg equation have been used to give reliable results. Furthermore, an estimation for the cross relaxation efficiency is derived from the emission spectra as a function of doping concentration and temperature. In addition, nearly re-absorption-free fluorescence lifetimes for various doping concentrations were studied. It was found that a double exponential fit model is better suited than a migration model to represent the fluorescence decay curves. The measurement results are interpreted in the light of the application of Tm:CaF2 as an efficient active medium in high-energy class diode-pumped solid state lasers. |
| Databáze: | OpenAIRE |
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