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 ≈ 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 dietrich2017highly
%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 Optical Society of America
%J Optics Express
%K grating myown peer polarization secondharmonicgeneration shg thindisklaser
%N 5
%P 4917--4925
%R https://doi.org/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 https://www.osapublishing.org/oe/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 ≈ 20), which is suitable for standard beam delivery using fibers with a core diameter of 100 µm and a NA of 0.2.
@article{dietrich2017highly,
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·mrad (M2 ≈ 20), which is suitable for standard beam delivery using fibers with a core diameter of 100 µm and a NA of 0.2.},
added-at = {2018-03-06T14:06:01.000+0100},
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/2812c234745c4fe15eb5028e58bf323ad/tomdietrich},
doi = {https://doi.org/10.1364/OE.25.004917},
interhash = {1f31f0168c5c436c03641fc03c58a082},
intrahash = {812c234745c4fe15eb5028e58bf323ad},
journal = {Optics Express},
keywords = {grating myown peer polarization secondharmonicgeneration shg thindisklaser},
number = 5,
pages = {4917--4925},
publisher = {Optical Society of America},
timestamp = {2019-04-18T11:51:13.000+0200},
title = {Highly-efficient continuous-wave intra-cavity frequency-doubled Yb: LuAG thin-disk laser with 1 kW of output power},
url = {https://www.osapublishing.org/oe/abstract.cfm?uri=oe-25-5-4917},
volume = 25,
year = 2017
}