We report on the generation of continuous-wave, intra-cavity frequency-doubled, multi-mode laser radiation in an Yb:LuAG thin-disk laser. Output powers of up to 1 kW at a wavelength of 515 nm were achieved at an unprecedented optical efficiency of 51.6\% with respect to the pumping power of the thin-disk laser. The wavelength stabilization and spectral narrowing as well as the polarization selection, which is necessary for a stable and efficient second-harmonic generation, was achieved by the integration of a diffraction grating into the dielectric end mirror of the cavity, which exhibits a diffraction efficiency of 99.8\%. At a frequency-doubled output power of 820 W the peak-to-valley power fluctuations measured during 100 minutes of laser operation amounted to only 8.2 W (1.0\%). The beam parameter product of the frequency-doubled output was 3.4 mm·mrad (M2 $\approx$ 20), which is suitable for standard beam delivery using fibers with a core diameter of 100 µm and a NA of 0.2.
%0 Journal Article
%1 dietrich2017highlyefficient
%A Dietrich, Tom
%A Piehler, Stefan
%A Rumpel, Martin
%A Villeval, Philippe
%A Lupinski, Dominique
%A Abdou-Ahmed, Marwan
%A Graf, Thomas
%D 2017
%I OSA
%J Optics Express
%K 2017 access fonds oa open stuttgart uni
%N 5
%P 4917--4925
%R 10.1364/OE.25.004917
%T Highly-efficient continuous-wave intra-cavity frequency-doubled Yb:LuAG thin-disk laser with 1 kW of output power
%U http://www.opticsexpress.org/abstract.cfm?URI=oe-25-5-4917
%V 25
%X We report on the generation of continuous-wave, intra-cavity frequency-doubled, multi-mode laser radiation in an Yb:LuAG thin-disk laser. Output powers of up to 1 kW at a wavelength of 515 nm were achieved at an unprecedented optical efficiency of 51.6\% with respect to the pumping power of the thin-disk laser. The wavelength stabilization and spectral narrowing as well as the polarization selection, which is necessary for a stable and efficient second-harmonic generation, was achieved by the integration of a diffraction grating into the dielectric end mirror of the cavity, which exhibits a diffraction efficiency of 99.8\%. At a frequency-doubled output power of 820 W the peak-to-valley power fluctuations measured during 100 minutes of laser operation amounted to only 8.2 W (1.0\%). The beam parameter product of the frequency-doubled output was 3.4 mm·mrad (M2 $\approx$ 20), which is suitable for standard beam delivery using fibers with a core diameter of 100 µm and a NA of 0.2.
@article{dietrich2017highlyefficient,
abstract = {We report on the generation of continuous-wave, intra-cavity frequency-doubled, multi-mode laser radiation in an Yb:LuAG thin-disk laser. Output powers of up to 1 kW at a wavelength of 515 nm were achieved at an unprecedented optical efficiency of 51.6\% with respect to the pumping power of the thin-disk laser. The wavelength stabilization and spectral narrowing as well as the polarization selection, which is necessary for a stable and efficient second-harmonic generation, was achieved by the integration of a diffraction grating into the dielectric end mirror of the cavity, which exhibits a diffraction efficiency of 99.8\%. At a frequency-doubled output power of 820 W the peak-to-valley power fluctuations measured during 100 minutes of laser operation amounted to only 8.2 W (1.0\%). The beam parameter product of the frequency-doubled output was 3.4 mm{\textperiodcentered}mrad (M2 $\approx$ 20), which is suitable for standard beam delivery using fibers with a core diameter of 100 {\textmu}m and a NA of 0.2.},
added-at = {2018-04-22T14:59:05.000+0200},
author = {Dietrich, Tom and Piehler, Stefan and Rumpel, Martin and Villeval, Philippe and Lupinski, Dominique and Abdou-Ahmed, Marwan and Graf, Thomas},
biburl = {https://puma.ub.uni-stuttgart.de/bibtex/29095f92ca171038786ac947f693b3e1a/droessler},
doi = {10.1364/OE.25.004917},
interhash = {1f31f0168c5c436c03641fc03c58a082},
intrahash = {9095f92ca171038786ac947f693b3e1a},
journal = {Optics Express},
keywords = {2017 access fonds oa open stuttgart uni},
month = mar,
number = 5,
pages = {4917--4925},
publisher = {OSA},
timestamp = {2018-04-22T12:59:05.000+0200},
title = {Highly-efficient continuous-wave intra-cavity frequency-doubled Yb:LuAG thin-disk laser with 1 kW of output power},
url = {http://www.opticsexpress.org/abstract.cfm?URI=oe-25-5-4917},
volume = 25,
year = 2017
}