Efficient Yb:KGW lasers end-pumped by high-power diode bars
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The laser performance of Yb:KGW under end-pumping with high-power diode bars has been investigated. In one configuration, the pump is delivered through an optical fiber yielding a symmetric but unpolarized pump spot. In the second configuration, the pump is delivered through an optical lens system yielding a polarized but asymmetric pump spot. Both configurations resulted in a maximum optical to optical efficiency of 47% and a maximum power of 12.4 W has been generated with the fiber coupled pump source. The output power was limited by crystal fracture, which occurred at an estimated temperature gradient of 1.2×105 K/m. Thermal lensing and laser tuning characteristics are also investigated.
KeywordsPump Power Output Coupler Thermal Lens Laser Crystal Incident Pump Power
- 6.S. Erhard, J. Gao, A. Giesen, K. Contag, A.A. Lagatsky, A. Abdolvand, N.V. Kuleshov, J. Aus der Au, G.J. Spühler, F. Brunner, R. Paschotta, U. Keller, Technical Digest. Summaries of papers presented at the Conference on Lasers and Electro-Optics 2001, 333-4Google Scholar
- 17.V.E. Kisel, A.E. Troshin, V.G. Shcherbitsky, N.V. Kuleshov, in ASSP 2003 paper WB7Google Scholar
- 18.J.E. Hellström, S. Bjurshagen, V. Pasiskevicius, Appl. Phys. B 10 (2006), doi: 1007/s00340-005-2115-8Google Scholar