Abstract
A new, scalable concept for diode-pumped high-power solid-state lasers is presented. The basic idea of our approach is a very thin laser crystal disc with one face mounted on a heat sink. This allows very high pump power densities without high temperature rises within the crystal. Together with a flat-top pump-beam profile this geometry leads to an almost homogeneous and one-dimensional heat flux perpendicular to the surface. This design dramatically reduces thermal distortions compared to conventional cooling schemes and is particularly suited for quasi-three-level systems which need high pump power densities. Starting from the results obtained with a Ti:Sapphire-pumped Yb:YAG laser at various temperatures, the design was proved by operating a diode-pumped Yb:YAG laser with an output power of 4.4 W and a maximum slope efficiency of 68%. From these first results we predict an exctracted cw power of 100 W at 300 K (140 W at 200 K) with high beam quality from a single longitudinally pumped Yb: YAG crystal with an active volume of 2 mm3. Compact diode-pumped solid-state lasers in the kilowatt range seem to be possible by increasing the pump-beam diameter and/or by using several crystal discs.
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P. Lacovara, C.A. Wang, H.K. Choi, R.L. Aggarwal, T.Y. Fan: InProc. Conf. on Lasers and Electro-Optics. OSA Technical Digest Ser., Vol. 9 (Opt. Soc. Am., Washington, DC 1991) p. 36 P. Lacovara, C.A. Wang, H.K. Choi, R.L. Aggarwal, T.Y. Fan: Opt. Lett.16, 1089 (1991)
L.D. Deloach, S.A. Payne, W.F. Krupke, L.K. Smith, W.L. Kway, J.B. Tassano, B.H.T. Chai: InOSA Proc. on Adv. Solid-State Lasers, ed. by A.A. Pinto, T.Y. Fan, Vol. 15 (Opt. Soc. Am., Washington, DC 1993) p. 188
T.Y. Fan: IEEE J. QE-29, 1457 (1993)
T.Y. Fan, R.L. Byer: IEEE J. QE-23, 605 (1987)
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Giesen, A., Hügel, H., Voss, A. et al. Scalable concept for diode-pumped high-power solid-state lasers. Appl. Phys. B 58, 365–372 (1994). https://doi.org/10.1007/BF01081875
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DOI: https://doi.org/10.1007/BF01081875