Anti-Stokes luminescence cooling of Tm3+ doped BaY2F8.

Anti-Stokes luminescence cooling of Tm3+ doped BaY2F8.

Optics express (2008-06-11)

Wendy Patterson, Stefano Bigotta, Mansoor Sheik-Bahae, Daniela Parisi, Mauro Tonelli, Richard Epstein

ABSTRACT

We report laser-induced cooling with thulium-doped BaY2F8 single crystals grown using the Czochralski technique. The spectroscopic characterization of the crystals has been used to evaluate the laser cooling performance of the samples. Cooling by 3 degrees below ambient temperature is obtained in a single-pass geometry with 4.4 Watts of pump laser power at lambda = 1855 nm.

MATERIALS

Product Number

Brand

Product Description

236101

Sigma-Aldrich

Barium fluoride, powder, 98%

652458

Sigma-Aldrich

Barium fluoride, precipitated, 99.95% trace metals basis

202746

Sigma-Aldrich

Barium fluoride, 99.99% trace metals basis