Thermo-optic characterization of Yb:CaGdAlO 4 laser crystal
Résumé
Principal thermo-optic coefficients (TOCs), dn o /dT and dn e /dT, are measured for Yb:CaGdAlO 4 crystal, for the first time, to our knowledge. At the wavelength of ~1 μm, they equal –7.6 and –8.6 (× 10 −6 K −1), accordingly. Thermal coefficients of the optical path (TCOP) are determined for this crystal for the principal crystal cuts (a-cut and c-cut) and light polarizations (π or σ). Thermo-optic dispersion formulas are evaluated for both TOC and TCOP coefficients. Optical power of thermal lens is measured for diode-pumped a-cut Yb:CaGdAlO 4 ; it is also calculated on the basis of measured material parameters. Thermal conductivity of CaGdAlO 4 crystal is measured versus Yb concentration. The results indicate that a-cut Yb:CaGdAlO 4 can provide really " athermal " behavior.
Fichier principal
Thermo-optic characterization of Yb-CaGdAlO4 laser crystal.pdf (1.75 Mo)
Télécharger le fichier
Origine | Fichiers éditeurs autorisés sur une archive ouverte |
---|
Loading...