Growth, Structure, Spectroscopy, and Laser Operation of a “Mixed” Yb:(Y,Lu)3Al5O12 Garnet Crystal
Résumé
A single crystal of ytterbium-doped “mixed” yttrium–lutetium aluminum garnet with a stoichiometric composition (Y0.601Lu0.233Yb0.166)3Al5O12 was grown by the Czochralski method and its structure, vibronic, spectroscopic, laser properties were studied. The stimulated-emission cross-section for Yb3+ ions maximized to 2.53 × 10−20 cm2 at 1031 nm. emission bandwidth ~8 nm, reabsorption-free luminescence lifetime 2F5/2 state 1.063 ms. Pumped 941 Yb generated maximum output power 1.04 W 1.03 1.05 μm high slope efficiency 76.4% threshold 76 mW. continuous wavelength tuning over range 51.6 nm (1026.4–1078.0 nm) also achieved. Power scaling achieved using 969 diode-pumped microchip cavity. ~9 obtained 76% an almost circular beam profile.
| Origine | Fichiers éditeurs autorisés sur une archive ouverte |
|---|
