Yb:CaF2 Crystals

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Yb:CaF2 Crystals
The rapid development of Yb:CaF2 shows the potential of this promising new laser material for diodepumped large-scale high-energy lasers. Moreover, Yb:CaF2 seems suitable to compete with Yb:YAG in terms of both high-energy and high-average-power operation.
Crystal structure cubic
Density, g/cm³ 3.18 g/cm³
Emission cross section 2 x 10 -21 cm² @ 1030 nm
Fluorescence lifetime 2.4 ms
Lattice parameters a = 5.462 Å
Melting Point, deg 1418 °C
Mohs Hardness 4
Pointing group m3m
Refractive Index no = 1.4
Thermal Conductivity, W/(mK) 9.7 W/mK
Thermal expansion 18 × 10-6 / °C


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

  • Laser diode pump is feasible
  • Wide tunable
  • Cost effective
Name CoatingsDimensions, mmMaterial Price Quantity


AR / AR @ 1030 + 940 nm6 x 6 x 5Yb(3%):CaF2


AR / AR @ 1030 + 940 nm6 x 6 x 5Yb(5%):CaF2