Title :
Spectroscopic evaluation of Yb3+-doped glasses for optical refrigeration
Author :
Lei, Gang ; Anderson, Johnny E. ; Buchwald, Melvin I. ; Edwards, Bradley C. ; Epstein, Richard I. ; Murtagh, Michael T. ; Sigel, George H., Jr.
Author_Institution :
Los Alamos Nat. Lab., NM, USA
fDate :
10/1/1998 12:00:00 AM
Abstract :
The absorption and emission properties of Yb3+-doped ZBLANP, BIGaZYT and QX/Yb phosphate glasses are studied to evaluate their potential for laser-induced fluorescent cooling or optical refrigeration. The efficiency of optical refrigeration increases with pump wavelength in the anti-Stokes region. The cooling efficiencies of the three glasses as a function of temperature are evaluated at the wavelength λp corresponding to the absorption coefficient of 10 -3 cm-1. For temperatures <110 K, the cooling efficiency of the BIGaZYT glass may be more than twice that of the ZBLANP
Keywords :
absorption coefficients; cooling; fluorescence; infrared spectra; optical glass; phosphate glasses; photoluminescence; radiation pressure; radiative lifetimes; ytterbium; Yb3+-doped BIGaZYT; Yb3+-doped QX phosphate glasses; Yb3+-doped ZBLANP; Yb3+-doped glasses; ZBLANP:Yb; ZrF4-BaF2-LaF3-AlF3-NaF-PbF2:Yb; absorption coefficient; absorption properties; anti-Stokes region; cooling efficiencies; cooling efficiency; emission properties; laser cooling; laser-induced fluorescent cooling; optical refrigeration; pump wavelength; spectroscopic evaluation; Absorption; Cooling; Fluorescence; Glass; Optical pumping; Pump lasers; Refrigeration; Spectroscopy; Stimulated emission; Temperature;
Journal_Title :
Quantum Electronics, IEEE Journal of
