Applied Physics B

, 83:235 | Cite as

Efficient Yb:KGW lasers end-pumped by high-power diode bars

  • J.E. Hellström
  • S. Bjurshagen
  • V. Pasiskevicius
  • J. Liu
  • V. Petrov
  • U. Griebner


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.


Pump Power Output Coupler Thermal Lens Laser Crystal Incident Pump Power 
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Copyright information

© Springer-Verlag 2006

Authors and Affiliations

  • J.E. Hellström
    • 1
  • S. Bjurshagen
    • 1
  • V. Pasiskevicius
    • 1
  • J. Liu
    • 2
  • V. Petrov
    • 2
  • U. Griebner
    • 2
  1. 1.Department of PhysicsRoyal Institute of TechnologyStockholmSweden
  2. 2.Max-Born InstituteBerlinGermany

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