%0 Journal Article %1 rocker2019ultrafast %A Röcker, Christoph %A Negel, Jan-Philipp %A Loescher, André %A Dietrich, Tom %A Piehler, Stefan %A Dannecker, Benjamin %A Graf, Thomas %A Abdou Ahmed, Marwan %D 2019 %I SPIE %J Optical Engineering %K %N 9 %P 096102 %R 10.1117/1.OE.58.9.096102 %T Ultrafast thin-disk multipass laser amplifier scheme avoiding misalignment induced by natural convection of the ambient air %V 58 %X We report on an approach for a compact ultrafast thin-disk multipass laser amplifier making use of a highly compact geometric folding scheme. The setup is also suitable to minimize the effects caused by natural convection of hot air in front of the thin-disk on the amplified laser beam as it facilitates to orient the laser disk with its axis in the vertical direction. The efficacy of this approach is analyzed with finite-element method simulations of the heated laser crystal in ambient air with different orientations of the thin laser disk. The experiments confirm a significant improvement of the amplifier performance in terms of stability and an increase of the output power with nearly diffraction-limited beam quality (M2  ≤  1.4) by a factor of 3 with respect to the conventional orientation of the laser disk.

@article{rocker2019ultrafast, abstract = {We report on an approach for a compact ultrafast thin-disk multipass laser amplifier making use of a highly compact geometric folding scheme. The setup is also suitable to minimize the effects caused by natural convection of hot air in front of the thin-disk on the amplified laser beam as it facilitates to orient the laser disk with its axis in the vertical direction. The efficacy of this approach is analyzed with finite-element method simulations of the heated laser crystal in ambient air with different orientations of the thin laser disk. The experiments confirm a significant improvement of the amplifier performance in terms of stability and an increase of the output power with nearly diffraction-limited beam quality (M2  ≤  1.4) by a factor of 3 with respect to the conventional orientation of the laser disk.}, added-at = {2023-08-31T14:44:57.000+0200}, author = {Röcker, Christoph and Negel, Jan-Philipp and Loescher, André and Dietrich, Tom and Piehler, Stefan and Dannecker, Benjamin and Graf, Thomas and Abdou Ahmed, Marwan}, biburl = {https://puma.ub.uni-stuttgart.de/bibtex/20c8bc6cfac6c1c2315a2b954bfdc65b8/puma-wartung}, doi = {10.1117/1.OE.58.9.096102}, interhash = {430eabb059618dcecc02ff61165a3e53}, intrahash = {0c8bc6cfac6c1c2315a2b954bfdc65b8}, journal = {Optical Engineering}, keywords = {}, language = {eng}, number = 9, pages = 096102, publisher = {SPIE}, timestamp = {2023-08-31T12:44:57.000+0200}, title = {Ultrafast thin-disk multipass laser amplifier scheme avoiding misalignment induced by natural convection of the ambient air}, volume = 58, year = 2019 }