what's Nd:KGW(Nd:KGd(WO4)2) crystal? where's neodymium doped potassium gadolinium tungstate(Nd:KGW) single crystals? how to buy ytterbium doped potassium gadolinium tungstate Yb:KGW (Yb:KGd(WO4)2) lasers?

DFNano® supplier of laser crystal neodymium doped potassium gadolinium tungstate(Nd:KGW); manufacturer of ytterbium doped potassium gadolinium tungstate Yb:KGW (Yb:KGd(WO4)2) crystals in china.

what's Nd:KGW(Nd:KGd(WO4)2) crystals?

Nd:KGW is a low-threshold, highly effective laser material. At low pumping energies (0.5 to 1.0 J), KGW is one the few materials ensuing an effective laser generation. The efficiency of a KGW laser with low pump power may be 3 - 5 times better than that of a YAG laser. KGW single crystals can also be used for the fabrication of high-efficiency lasers with high output energy.

Neodymium doped Potassium-Gadolinium Tungstate crystal (Nd:KGd(WO4)2 or Nd:KGW) is an excellent laser gain material which has low laser oscillations threshold and higher emission section. The fluorescent concentration quench effect of the Nd3+ ion in the KGW crystal may be weakened due to the W-O covalent bond, so this crystal has a higher doping concentration of active ion. Furthermore, the absorption band at 808nm of Nd3+ in the KGW which has 12nm FWHM is well matched with the emission wavelength of current commercial laser diode

neodymium doped gadolinium vanadate(Nd:GdVO4) crystals parameters

Nd:KGW(Nd:KGd(WO4)2) laser crystals
crystal structuremonoclinic
Space groupC2h(2/c)-C2/c
Cell Parametersa = 8.087Å; b = 10.374 Å; c = 7.588Å β=94.41°
refractive index, at 1067 nmnq = 2.049; np = 1.978; nm = 2.014
Mohs hardness5
Density, g/cm37.27
Melting Point1075°C
Thermal conductivity at 373°K, W x cm-1 x °K-1K[100] = 0.026; K[010]= 0.038; K[001] = 0.034
Young’s modulus, GPaE[100] = 115.8; E[010]= 152.5; E[001] = 92.4
Termal expansion coefficient, at 373°Kα[100] = 4 x 10-6 x °K-1; α[010]= 1.6 x 10-6 x °K-1[001]= 8.5 x 10-6 x °K-1
Lasing Wavelength911nm,1067nm,1351nm
Absorption band808nm(FWHM 12nm)
luorescent lifetime110 μs (3% doping), 90 μs ( 8% doping)
Standard Dopant concentration (at. %)3%, 5%, 8%
Maximum length50mm
Length tolerance, mm+1.0 / -0.0
Diameter tolerance, mm+/-0.1
Parallelism< 30"
Perpendicularity< 15'
Surface quality20/10(MIL-PRF-13830B)
Total 26 Nd:KGW(Nd:KGd(WO4)2) laser crystals
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