Darmstadt 2008 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 4: Laserentwicklung (Festkörperlaser I)
Q 4.6: Vortrag
Montag, 10. März 2008, 15:15–15:30, 3H
Photophysical Characterisation of Pyrromethene 597 Laser Dye in Cross-linked Silicon-containing Organic Copolymers — •Amit Tyagi1, David del Agua2, Alfons Penzkofer1, O. García2, Robert Sastre2, Angel Costela3, and Immaculata García-Moreno3 — 1Institut II - Physik, Universität Regensburg, D-93040 Regensburg — 2Instituto de Ciencia y Tecnología de Polímeros, CSIC, Juan de la Cierva 3, 28006 Madrid, Spain — 3Instituto de Química Física "Rocasolano", CSIC, Serrano 119, 28006 Madrid, Spain
Dipyrromethene-BF2 PM597 dye-doped copolymers resembling inorganic-organic hybrids were characterized towards their application as solid-state laser rods. The inorganic function was entered by the silicon containing constituent 3-(trimethoxysilyl)propyl methacrylate (TMSPMA). The organic constituents are monomers with one [methyl methacrylate (MMA)], two [ethylene glycol dimethacrylate (EGDMA)], three [pentaerythriol triacrylate (PETA)], and four [pentaerythriol tetraacrylate (PETRA)] polymerizable groups. The thermo-mechanical stability of the samples increased with the number of cross-linking groups (studied by thermogravimetry and differential scanning calorimetry), while the optical and lasing parameters were found to be similarly good for all investigated silicon containing samples (fluorescence quantum yield around 60 %, excited-state absorption less than 10 % of ground-state absorption, more than 3 million excitation cycles before degradation).