Description
Introduction
Ytterbium-doped Calcium fluoride (Yb:CaF2), grown by Czochralski technique, is with long fluorescence lifetime and broad absorption bands, which make it an ideal material for laser diode pumping. Yb:CaF2 exhibits broad emission bandwidth as well as limited non-linear effects under intense irradiation, supporting generation of ultra-short pulses and high-power operation.
CASTECH’s laser crystal Yb: CaF2 is featured by
• Low quantum defect, long fluorescence lifetime
• Wide optical transmission range (0.12 µm~10 µm)
• Low dispersion behavior
• Limited nonlinear effects under intense laser irradiation
• Customized coatings are available
Table 1. Basic Properties
| Dopant Concentration | 1~10 at.% |
| Absorption Peak Wavelength | 979 nm |
| Absorption Cross Section @980 nm | 5.4 × 10-21 cm2 |
| Emission Cross Section @1035 nm | 2.3 × 10-21 cm2 |
| Fluorescence Lifetime | 2.2 ms |
| Refractive Index @1035 nm | 1.42866 |
| Crystal Structure | Cubic |
| Cleavage Plane | (111) |
| Melting Point | 1418 ℃ |
| Nonlinear Refractive Index | 1.9×10-16 cm2/W |
| Density | 3.18 g/cm3 |
| Thermal Conductivity | 9.71 W/m/K |
| Thermal Expansion Coefficient | 18.41×10-6 /K |
| Mohs Hardness | 4 Mohs |
