ETD system

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Tesi etd-11182016-172535


Thesis type
Tesi di dottorato di ricerca
Author
VOLPI, AZZURRA
URN
etd-11182016-172535
Title
Cooling effect on fluoride crystals
Settore scientifico disciplinare
FIS/03
Corso di studi
FISICA
Commissione
tutor Prof. Tonelli, Mauro
commissario Chiofalo, Maria Luisa
commissario Prof. Seletskiy, Denis
commissario Prof. Bettinelli, Marco
Parole chiave
  • laser
  • cooling
  • fluorides
  • crystal
  • growth
  • Yb-doped
Data inizio appello
20/12/2016;
Consultabilità
parziale
Data di rilascio
20/12/2019
Riassunto analitico
In this work various Yb-doped fluoride single crystals have been investigated as active media for optical refrigeration. For each material, samples with varying doping levels have been grown by means of the Czochralski technique, optically charaterized through absorption, static and dynamic fluorescence measurements and tested for anti-Stokes cooling. The optical cooling efficiency has been measured by measuring the heating/cooling temperature change of samples as a function of pumping wavelength. A preliminary investigation of impurities by elemental analyses has been also carried out.
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