Heidelberg 2015 – wissenschaftliches Programm
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Q: Fachverband Quantenoptik und Photonik
Q 31: Poster: Quantum Optics and Photonics II
Q 31.68: Poster
Dienstag, 24. März 2015, 17:00–19:00, C/Foyer
Gain and excited state absorption in Tb3+:LiLuF4 — •Ahmad Majid1, Philip Werner Metz1, Daniel-Timo Marzahl1, Christian Kränkel1,2, and Günter Huber1,2 — 1Institut für Laser-Physik, Universität Hamburg, Deutschland — 2The Hamburg Centre for Ultrafast Imaging, Universität Hamburg, Deutschland
Because of their numerous potential applications, for example, optical data storage, biochemical spectroscopy, and laser material processing, many efforts have been made regarding the development of visible solid state lasers. Due to the 5D4→7F5 laser transition, located within the green spectral region, the trivalent terbium ion is an excellent candidate for visible solid state lasers. The first terbium laser was demonstrated in 1967. In this case pulsed laser operation in the 544 nm band was achieved under flash-lamp pumping. Due to the long excited state life-time of 5 ms of Tb3+:LiLuF4, it seems to be well suited for Q-switched laser operation in the visible spectral range. The emission spectroscopy shows that other laser transitions at 586 nm and 620 nm could be possible. However excited state absorption spectroscopy (ESA) proves that gain in the green and yellow region can be achieved while it is impossible to achieve laser emission at 620 nm.