Hannover 2013 – scientific programme
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Q: Fachverband Quantenoptik und Photonik
Q 43: Poster II
Q 43.3: Poster
Wednesday, March 20, 2013, 16:00–18:30, Empore Lichthof
Spectroscopy and self-pulsed red and orange laser operation of Sm3+ doped LiLuF4 crystals — •Philip Werner Metz1, Francesca Moglia1, Sebastian Müller1, Fabian Reichert1, Daniel-Timo Marzahl1, Nils-Owe Hansen1, Matthias Fechner1, Christian Kränkel1,2, and Günter Huber1,2 — 1Universität Hamburg, Institut für Laser-Physik — 2The Hamburg Center for Ultrafast Imaging
Most solid state lasers with emission wavelengths in the visible spectral region were so far based on nonlinear processes. In the recent years the development of new excitation sources emitting in the blue spectral region, e.g. InGaN-laser diodes and frequency doubled optically pumped semiconductor lasers (2ω-OPSL), have opened access to solid state lasers emitting directly in the visible spectral region. The most common ion for visible laser radiation within the rare earths is the praseodymium ion. However there are a couple of other rare earth ions with absorption lines in the blue spectral region which might support short wavelength laser operation. In this contribution we present spectroscopic investigations and our first results of laser experiments with Sm3+:LiLuF4 crystals. The lasers were continuously pumped by a 2ω-OPSL at a wavelength of 479 nm and emitted irregular pulses in the kHz range at wavelengths of 605 nm, and 640 nm with average output powers up to 30 mW and puls durations of several µs. The repetition rates of the lasers grow almost linear with the absorbed pump power while the pulse shapes remain almost constant, indicating a pulse mechanism comparable to a passive Q-switch.