Optical Cooling in Er3+:KPb2Cl5

Abstract

For the first time, optical cooling has been observed in the (4)I(13/2) excited state of erbium(III), using the low phonon energy host material, potassium lead chloride (KPb(2)Cl(5)). Cooling was observed when samples were pumped at wavelengths longer than 1557 nm, 17 nm longer than the mean fluorescence wavelength of 1540 nm, which implies a nonradiative heat load of 1.1% for the (4)I(13/2) -> (4)I(15/2) transition. When pumped at 1568 nm, the total cooling efficiency was 0.38% of the absorbed power. These results highlight the potential of Er(3+):KPb(2)Cl(5) as a material for lasers operating in an eye safe spectral region.

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Document Details

Document Type
Technical Report
Publication Date
Jan 01, 2009
Accession Number
ADA520063

Entities

People

  • Carl E. Mungan
  • Nicholas J. Condon
  • Richard S. Quimby
  • Shawn P. O'connor
  • Steven R. Bowmen

Organizations

  • United States Naval Research Laboratory

Tags

Communities of Interest

  • Energy and Power Technologies

DTIC Thesaurus Topics

  • Absorption
  • Absorption Spectra
  • Emission Spectra
  • Fluorescence
  • Laser Cooling
  • Laser Diodes
  • Laser Materials
  • Lasers
  • Materials
  • Optical Materials
  • Optics
  • Refractive Index
  • Single Crystals
  • Spectra
  • Spectroscopy
  • United States Naval Academy
  • Yag Lasers

Fields of Study

  • Physics

Readers

  • Energy Conservation and Renewable Energy Engineering.
  • Materials Science and Engineering.

Technology Areas

  • Directed Energy
  • Directed Energy - Lasers