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New materials for optical cooling

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Abstract.

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.

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Authors and Affiliations

  1. Photonics Technology Branch, Naval Research Laboratory, Washington, DC 20375-5320, USA (E-mail: bowman@ccf.nrl.navy.mil), , , , , , US

    S.R. Bowman

  2. Department of Physics, U.S. Naval Academy, Annapolis, MD 21402, USA, , , , , , US

    C.E. Mungan

Authors
  1. S.R. Bowman
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  2. C.E. Mungan
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Received: 1 February 2000 / Revised version: 15 June 2000 / Published online: 13 September 2000

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Bowman, S., Mungan, C. New materials for optical cooling . Appl Phys B 71, 807–811 (2000). https://doi.org/10.1007/s003400000416

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  • DOI: https://doi.org/10.1007/s003400000416

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