Alfa Chemistry provides undoped potassium gadolinium tungstate (KGW) crystal materials. KGW crystals have good mechanical properties, relatively good thermal conductivity and a wide range of transparency. They have attracted much attention as the most suitable crystals for stimulated Raman scattering (SRS).
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Catalog Number
ACMA00027560
Product Name
KGW Crystals, 30mm Length, uncoated
Molecular Formula
KGd(WO4)2
Doping
undoped
Width
5 mm
Height
5 mm
Length
30 mm
DimensionTolerance
W±0.1mm/H±0.1mm/L±0.2mm
Coating
uncoated
Flatness
λ/8@632.8 nm
Parallelism
< 20 arcsec
Perpendicularity
<10 arcmin
Surface Quality
10-5 S-D
ClearAperture
>90%
Crystal Structure
Monoclinic, C2c
Lattice Parameters
a = 10.652(4) Å, b = 10.374(6) Å, c = 7.582(2) Å
Density
7.27 g/cm3
Refractive Indices
(@1040 nm) np=1.982, nm=2.010, ng=2.061
Thermal Optical Coefficient
dnp/dT = -15.7×10-6 /K
dnm/dT = -11.8×10-6 /K
dng/dT = -17.3×10-6 /K
Thermal Conductivity
Ka = 2.6W/m/K, Kb = 3.8W/m/K, Kc = 3.4W/m/K
Damage Threshold
(Laser-induced) >10 J/cm2@1064 nm, 10 ns
Transmission
0.35-5.5 µm
Chamfers
<0.1 mm at 45˚
Raman Frequency Shift
901 /cm (p[mm]p); 767 /cm (p[gg]p)
Raman Linewidth
5.4 /cm@901 /cm (p[mm]p); 6.4 /cm@767 /cm (p[gg]p)
Dephasing Time
2 ps
Moh'sHardness
4~5
MSDS
COA
Spec Sheet
Broad transparency range from 300 nm to 5 μm; two pump polarization dependent Raman shifts at 768/cm and 901/cm
Picosecond Nd:YAG Laser Pumped Raman Generator