New Materials for Optical Cooling

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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Document Details

Document Type
Technical Report
Publication Date
Dec 01, 2000
Accession Number
ADA574897

Entities

People

  • C. E. Mungan
  • S. R. Bowman

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Coefficients
  • Absorption Spectra
  • Crystals
  • Deflection
  • Efficiency
  • Emission Spectra
  • Energy Levels
  • Figure Of Merit
  • Fluorescence
  • Laser Materials
  • Lasers
  • Materials
  • Radiation
  • Solid State Lasers
  • Spectra
  • Ytterbium

Fields of Study

  • Physics

Readers

  • Optical Physics and Photonics.
  • Thermal Physics or Thermal Science.

Technology Areas

  • Directed Energy