The large gain bandwidth of Yb3+:KGW crystals enables them to achieve pulse durations of <100 fs in mode-locked operation. Compared with other ytterbium-doped gain media with the same large gain bandwidth, ytterbium-doped tungstate has a considerably higher emission cross-section. We offer different types of Yb3+:KGW crystals.
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Catalog Number
ACMA00027475
Product Name
Yb:KGW Crystals, 3%Doping, Brewster-angle cut, 5 mm*5 mm
Melting Point
1075 ℃
Doping
0.03
Wedge Of Ends
Brewster-angle cut
Width
5 mm
Height
5 mm
Length
3 mm
Orientation
Ng-cut; Np(b)-cut and other orientation available
DimensionTolerance
W±0.1mm/H±0.1mm/L±0.2mm
Coating
uncoated
Flatness
<λ/10@632.8 nm
Parallelism
< 10 arcsec
Perpendicularity
<10 arcmin
Surface Quality
10-5 S-D
ClearAperture
>90%
Crystal Structure
Monoclinic
Lattice Parameters
a=8.095Å, b=10.43Å,
c=7.588Å, β=94.43°
Density
7.25 g/cm3
Wavelength
1025 (1020-1060) nm (laser wavelength)
Refractive Indices
(@1064nm) ng= 2.037, np= 1.986, nm= 2.033
Expansion Coefficient
(Thermal expansion coefficient)
αp = 1.7 × 10-6 K-1
αm = 11.01 × 10-6 K-1
αg = 17.37 × 10-6 K-1
Thermal Optical Coefficient
dnp/dT = -15.7 × 10-6 K-1
dnm/dT = -11.8 × 10-6 K-1
dng/dT = -17.3 × 10-6 K-1
Thermal Conductivity
Ka= 2.6 W/m/K
Kb= 3.8 W/m/K
Kc= 3.4 W/m/K
Damage Threshold
(Laser-induced) >10 J/cm2@1040 nm, 10 ns
Fluorescence Lifetime
0.3 ms
Absorption Cross Section
(at peak) 12×10-20 cm2
Bandwidth
(absorption bandwidth at a peak wavelength) 3.7 nm
Emission Cross Section
(@1030) 3×10-20 cm2
Absorption Wavelength
980 nm
Moh'sHardness
4~5
MSDS
COA
Spec Sheet
1. Large gain bandwidth 2. High emission profile 3. Small quantum defects 4. High doping levels 5. High thermal conductivity
Femtosecond lasers and regenerative amplifiers; CW and passively mode-locked thin-disk lasers