Heidelberg 2015 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 30: Laser Development: Solid State and Semiconductor Lasers
Q 30.3: Talk
Tuesday, March 24, 2015, 15:00–15:15, K/HS2
Spectroscopy and Laser Operation of Nd,Mg:SrAl12O19 — •Liang Gong1, Daniel-Timo Marzahl1, Thomas Calmano1,2, Fabian Reichert3, Christian Kränkel1,2, and Günter Huber1,2 — 1Institut für Laser-Physik, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 2The Hamburg Centre for Ultrafast Imaging, Universität Hamburg, Luruper Chaussee 149, 22761 Hamburg, Germany — 3Center for Free-Electron Laser Science, Luruper Chaussee 149, 22761 Hamburg, Germany
The host material SrAl12O19 (SRA) exhibits excellent thermo-mechanical properties which makes it interesting for high power laser application. The trivalent Nd3+ is a well-known rare earth ion with transitions around 1µm. In our laboratory Nd,Mg:SRA crystals with various doping concentrations were grown by the Czochralski method. Spectroscopic data show that the two strongest transitions from the emitting 4F3/2-multiplets of Nd,Mg:SRA crystals are centered at 900 nm and 1050 nm. These transitions exhibit emission cross sections of 4.6·10−20 cm2 and 2.0·10−20 cm2 in σ polarization, respectively. The highest absorption cross section in the spectral range between 750 nm and 920 nm is 3.6·10−20 cm2 at 798 nm. In this contribution we report about laser emission at 900 nm with 62% slope efficiency and 0.79 W maximum output power. Moreover, laser operation at 1050 nm with 55% slope efficiency and 1.6 W maximum output power is achieved.