Applied Physics B

, Volume 80, Issue 6, pp 635–638 | Cite as

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

  • S. Tokita
  • J. Kawanaka
  • M. Fujita
  • T. Kawashima
  • Y. Izawa
Rapid Communication

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.

PACS

42.55.Rz 42.55.Xi 

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Copyright information

© Springer-Verlag 2005

Authors and Affiliations

  • S. Tokita
    • 1
  • J. Kawanaka
    • 1
  • M. Fujita
    • 3
  • T. Kawashima
    • 3
  • Y. Izawa
    • 1
  1. 1.Institute of Laser EngineeringOsaka UniversitySuitaJapan
  2. 2.Institute for Laser TechnologySuitaJapan
  3. 3.Central Research LaboratoryHamakitaJapan

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