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Sapphire-conductive end-cooling of high power cryogenic Yb:YAG lasers

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Abstract

We have demonstrated a high-power laser oscillator with end-cooling using a sapphire-sandwiched Yb:YAG disk at near liquid nitrogen temperature. An output power of 75 W with a near-diffraction-limited beam was obtained from a 0.6-mm thick activemedium. The slope efficiency and themaximum optical–optical efficiency were 80 and 70%, respectively, with respect to absorbed pump power.

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Authors and Affiliations

  1. Institute of Laser Engineering, Osaka University, 2-6 Yamadaoka, Suita, Osaka, 565-0871, Japan

    S. Tokita, J. Kawanaka & Y. Izawa

  2. Central Research Laboratory, Hamamatsu Photonics K. K., 5000 Hirakuchi, Hamakita, Shizuoka, 434-8601, Japan

    M. Fujita & T. Kawashima

Authors
  1. S. Tokita
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  2. J. Kawanaka
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  3. M. Fujita
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  4. T. Kawashima
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  5. Y. Izawa
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Correspondence to S. Tokita.

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Tokita, S., Kawanaka, J., Fujita, M. et al. Sapphire-conductive end-cooling of high power cryogenic Yb:YAG lasers. Appl. Phys. B 80, 635–638 (2005). https://doi.org/10.1007/s00340-005-1779-4

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  • DOI: https://doi.org/10.1007/s00340-005-1779-4

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