New materials for optical cooling

New materials for optical cooling

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...

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Veröffentlicht in:Applied physics. B, Lasers and optics Lasers and optics, 2000-12, Vol.71 (6), p.807-811
Hauptverfasser: Bowman, S.R., Mungan, C.E.
Format: Artikel
Sprache:eng
Schlagworte:
Cooling
Crystals
Deflection
Fluorescence
Lasers
Refrigeration
Solid state lasers
Tungstates
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Beschreibung
Zusammenfassung: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 Yb-doped KGd(WO4)2 confirm anti-Stokes fluorescence cooling. This is the first observation of optical cooling in a crystal.
ISSN:0946-2171
1432-0649
DOI:10.1007/s003400000416