Berlin 2014 – wissenschaftliches Programm
Q 30: Poster: Photonics, laser development and applications, ultrashort laser pulses, quantum effects
Q 30.55: Poster
Dienstag, 18. März 2014, 16:30–18:30, Spree-Palais
Yb:Lu2O3 thin disk laser for intracavity cw-alignment of molecules — •Bastian Deppe1,2, Kolja Beil1, Günter Huber1,2, Jochen Küpper1,2,3, and Christian Kränkel1,2 — 1Department of Physics, University of Hamburg — 2Center for Ultrafast Imaging, University of Hamburg — 3Center for Free-Electron Laser Science, DESY, Hamburg
We are setting up a cw thin disk laser resonator with an intracavity power exceeding 150 kW in fundamental TEM00 mode with well-defined, linear or elliptical, polarization. This allows for focal intensities of more than 1010 W/cm2, sufficient for the adiabatic alignment of molecules due to the interaction of their polarizability anisotropy with the field of the cavity mode. Recently, 196 kW of pulsed average power have been demonstrated in an enhancement cavity [ASSL 2013, JTh5A.3]. This demonstrates that dieelectric coatings can sustain the high intracavity powers. The higher lasing efficiency of Yb:Lu2O3, compared to Yb:YAG, at very low output coupling rates reveals the higher optical quality of Yb:Lu2O3 and its better suitability for our purpose. We will present our results on scaling the intracavity power into the 100 kW regime with an 450 W diode-pumped thin disk laser in multi-mode operation in a short linear resonator. In addition, thermo-optical measurements of the laser disk will be shown for Yb:Lu2O3 allowing for detailed investigations regarding the resonator design and optimization of the gain material.