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        • Product name: Yb:KGW
        • Product ID: 116
        • Views : 1394


        Ytterbium doped Potassium-Gadolinium Tungstate crystals - (Yb:KGd(WO4)2 or Yb:KGW) is an excellent laser gain material which has important advantages over the widely used Nd3+ doped materials. Its broad spectral emission band 1023-1060nm allows the generation of short (ps or fs) laser pulses. Its wide absorption spectrum at 980 nm and high absorption of pump radiation allow an efficient use of diode laser pumping. Compared with YAG used as hosts for Yb3+, KGW has the advantage of larger absorption cross section, which decreases the minimum pump intensity necessary to achieve transparency in the quasi-two-level system of ytterbium.
        Basic Properties
         Crystal structure
         Point group
         Cell Parameters
          a = 8.09Å; b = 10.43 Å; c = 7.588 Å°
         Refractive index, at 1067 nm
         nq = 2.033; np = 2.037; nm = 1.986
         Mohs hardness
         Density, g/cm3
         Melting Point:
         Thermal conductivity at 373°K, W x cm-1 x °K-1
          K[100] = 0.026; K[010]= 0.038; K[001] = 0.034
         Termal expansion coefficient, at 373°K
         α[100] = 4 x 10-6 x °K-1; α[010]= 1.6 x 10-6 x °K-1; α [001]= 8.5 x 10-6 x °K-1
         Lasing Wavelength
         Absorption band
         981nm(FWHM 3.7nm)
         Fluorescent lifetime
         600 μs (5% doping)
        Specifications of Yb:KGW
         Standard Dopant concentration (at. %)
         Maximum length
         Length tolerance, mm
         +1.0 / -0.0
         Diameter tolerance, mm
         < 30
         < 15'
         Surface quality
         20/10 (MIL-PRF-13830B)