Applied Physics B

, Volume 71, Issue 6, pp 807–811 | Cite as

New materials for optical cooling

  • S.R. Bowman
  • C.E. Mungan


Well-characterized solid-state laser materials are evaluated for performance in optical refrigeration as well as radiation-balanced laser systems. New figures-of-merit are developed and applied to ytterbium-doped materials. Superior performance is predicted for high-cross-section tungstate materials. Photothermal deflection experiments on samples of Yb3+-doped KGd(WO4)2 confirm anti-Stokes fluorescence cooling. This is the first observation of optical cooling in a crystal.

PACS: 42.55.Rz; 42.70.Hj 


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Copyright information

© Springer-Verlag 2000

Authors and Affiliations

  • S.R. Bowman
    • 1
  • C.E. Mungan
    • 2
  1. 1.Photonics Technology Branch, Naval Research Laboratory, Washington, DC 20375-5320, USA (E-mail:
  2. 2.Department of Physics, U.S. Naval Academy, Annapolis, MD 21402, USAUS

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