Yb:CaF2 Crystals

Yb:CaF2 Crystals

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Crystal structure cubic
Pointing group m3m
Lattice parameters a = 5.462 Å
Thermal expansion 18 × 10-6 / °C
Thermal conductivity 9.7 W/mK
Density 3.18 g/cm³
Mohs hardness 4
Melting temperature 1418 °C
Refractive indices (l=1,06mm) no = 1.4
dn/ dT -10.00 x 10-6 / °K
Fluorescence lifetime 2.4 ms
Emission cross section 2 x 10 -21 cm² @ 1030 nm
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Due to Yb:CaF2 crystal low quantum defect and a comparably long fluorescence lifetime, ytter-bium-doped gain media are preferably utilized for high-power diode-pumped systems and laser amplifiers with high optical-to-optical conversion efficiencies. From this point of view, Yb:YAG is now the most important and developed one. Just recently, ytterbium-doped alkaline-earth fluori-des (Yb:CaF2) have attracted considerable interest for use in diode-pumped femtosecond (fs) la-sers and amplifiers.

Alkaline-earth fluorides which can be easily grown by using the standard Czochralski or Bridgman technique show a wide optical transmission range, a low dispersion behavior and limited nonlinear effects under intense laser irradiation. It was recently shown that Yb:CaF2 single crystal can be grown up to diameters of about 200 mm, which is superior for high-energy short-pulse lasers with centimeter-sized apertures

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Coatings Dimensions, mm Material Delivery Product ID Price Action
AR / AR @ 1030 + 940 nm 6 x 6 x 5 Yb(3%):CaF2 2-4 weeks 3-YB03CSF-01 900 €
AR / AR @ 1030 + 940 nm 6 x 6 x 5 Yb(5%):CaF2 2-4 weeks 3-YB05CSF-01 940 €


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