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Proceedings Paper

Power scaling and optimum crystal orientation in continuous-wave diode-pumped Yb:KLu (WO4)2 lasers
Author(s): Junhai Liu; Valentin Petrov; Xavier Mateos; Huaijin Zhang; Jiyang Wang
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Paper Abstract

Monoclinic potassium double tungstates are biaxial laser materials characterized by strong anisotropy of the spectroscopic properties. KLu(WO4)2 is the most attractive of them in the case of Yb-doping because of the close ionic radii of Yb and Lu. In this work we compare crystals of equal dimensions and doping level but different cuts, under the same pumping conditions. Special emphasis is placed on the polarization behavior. We present substantial power scaling with KLu(WO4)2 in the continuous-wave regime by longitudinal fiber-coupled diode laser pumping. Slope efficiency of roughly 80% is achieved while the naturally selected laser polarization is parallel either to the Np or Nm principal optical axes. A maximum output power of 11.0 W was produced from a 2 mm thick uncoated crystal with Ng-cut, the corresponding optical-to-optical efficiency was 68%.

Paper Details

Date Published: 14 February 2008
PDF: 7 pages
Proc. SPIE 6871, Solid State Lasers XVII: Technology and Devices, 68712F (14 February 2008); doi: 10.1117/12.761014
Show Author Affiliations
Junhai Liu, Qingdao Univ. (China)
Valentin Petrov, Max-Born-Institute for Nonlinear Optics and Ultrafast Spectroscopy (Germany)
Xavier Mateos, Univ. Rovira i Virgili (Spain)
Huaijin Zhang, Shandong Univ. (China)
Jiyang Wang, Shandong Univ. (China)

Published in SPIE Proceedings Vol. 6871:
Solid State Lasers XVII: Technology and Devices
W. Andrew Clarkson; Norman Hodgson; Ramesh K. Shori, Editor(s)

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