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Laser performance and thermal lensing in high-power diode-pumped Yb:KGW with athermal orientation

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Abstract

A comparative, experimental study of the high-power diode-pumped laser performance and thermal lensing properties between standard b-cut Yb:KGW and Yb:KGW cut along an athermal direction is presented. The results show that thermal lens properties in both the b-cut and the athermal direction-cut crystals are determined by anisotropic thermal expansion in Yb:KGW. Thermal gradients due to the pump beam cause thermal lensing even in the athermal direction-cut geometry. The thermal lens is much weaker and less astigmatic in the athermal direction-cut crystal, for the same absorbed power. These properties allow generation of better-quality laser beams with the athermal direction-cut crystal as compared to the b-cut crystal.

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Authors and Affiliations

  1. Department of Physics, Royal Institute of Technology, 10044, Stockholm, Sweden

    J.E. Hellström, S. Bjurshagen & V. Pasiskevicius

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  1. J.E. Hellström
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  2. S. Bjurshagen
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  3. V. Pasiskevicius
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Correspondence to J.E. Hellström.

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PACS

42.55.Xi; 42.60.Jf; 42.70.Hj

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Hellström, J., Bjurshagen, S. & Pasiskevicius, V. Laser performance and thermal lensing in high-power diode-pumped Yb:KGW with athermal orientation. Appl. Phys. B 83, 55–59 (2006). https://doi.org/10.1007/s00340-005-2115-8

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  • DOI: https://doi.org/10.1007/s00340-005-2115-8

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