Yb:KYW crystals
Main features
- Large gain bandwidth
- High emission cross-sections
- Small quantum defect
- High doping level
- High enough thermal conductivity
- Custom crystals available upon request
Application examples
- Femtosecond lasers and regenerative amplifiers
- CW and passively mode-locked thin-disk lasers
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- Description
- Properties
- Absorption and emission curves
- Standard specifications
Yb3+:KYW crystals possess a large gain bandwidth that enables them to obtain <100 fs pulse duration in the mode-locked regime of operation. Compared with other ytterbium-doped gain media with a similarly large gain bandwidth, ytterbium-doped tungstates have fairly high emission cross-sections. The ytterbium doping concentration in Yb:KYW crystals can be very high without a significant quenching. Thermal conductivity of common double tungstates is in the range of 3–4 Wm-1K-1. Yb:KYW crystals also feature a small quantum defect.
Spectroscopic and thermo-mechanical properties | |
---|---|
Absorption peak wavelength | 980 nm |
Absorption cross-section at peak wavelength | 14 × 10-20 cm2 (E||Nm) |
Absorption bandwidth at peak wavelength | ~3 nm |
Laser wavelength | 1020 (1020-1050) nm |
Lifetime of 2F5/2 ytterbium energy level | 230 μs |
Emission cross-section at 1030 nm | 2,5 × 10-20 cm2 (E||Nm) |
Refractive index at 1064 nm | ng= 2,037 np= 1,986 nm= 2,033 |
Crystal structure | Monoclinic |
Density | 6,61 g/cm3 |
Mohs hardness | 4-5 |
Thermal conductivity | ~3,3 Wm-1K-1 |
dn/dT | dnp/dT = -13,08 × 10-6 K-1 dnm/dT = -7,61 × 10-6 K-1 dng/dT = -11,83 × 10-6 K-1 |
Thermal expansion coefficient | αp= 1,9 × 10-6 K-1 αm= 10,3 × 10-6 K-1 αg= 16,5 × 10-6 K-1 |
Typical doping level | 1-100 at. % |
Yb:KYW crystals | |
---|---|
Orientation | Ng-cut; Np(b)-cut and other orientation available |
Clear aperture | >90% |
Face dimensions tolerance | +0,0/-0,1 mm |
Length tolerance | ±0,1 mm |
Parallelism error | <10 arcsec |
Perpendicularity error | <10 arcmin |
Protective chamfers | <0,1 mm at 45˚ |
Surface quality | 10-5 S-D |
Surface flatness | <λ/10@632,8 nm |
Coatings | AR(R<0,5%)@970-1070 nm |
Laser-induced damage threshold | >10 J/cm2@1040 nm, 10 ns |
Mount | Uncoated |
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Face dimensions
Length
End faces
Orientation
Doping
Coatings
SKU
PRICE
QUANTITY
3x3 mm
5 mm
Right-angle cut
Ng-cut
2%
AR/AR@970-1070 nm
7035
590 €
5x5 mm
5 mm
Right-angle cut
Ng-cut
2%
AR/AR@970-1070 nm
7036
590 €
3x3 mm
5 mm
Brewster-angle cut
Ng-cut
2%
uncoated
7037
540 €
5x5 mm
5 mm
Brewster-angle cut
Ng-cut
2%
uncoated
7038
540 €
3x3 mm
2 mm
Brewster-angle cut
Ng-cut
5%
uncoated
7039
540 €
5x5 mm
2 mm
Right-angle cut
Ng-cut
5%
AR/AR@970-1070 nm
7040
590 €
3x3 mm
2 mm
Right-angle cut
Ng-cut
5%
AR/AR@970-1070 nm
7041
590 €
5x5 mm
2 mm
Brewster-angle cut
Ng-cut
5%
uncoated
7042
540 €
3x3 mm
1 mm
Right-angle cut
Ng-cut
10%
AR/AR@970-1070 nm
7043
590 €
5x5 mm
1 mm
Right-angle cut
Ng-cut
10%
AR/AR@970-1070 nm
7044
590 €
3x3 mm
1 mm
Brewster-angle cut
Ng-cut
10%
uncoated
7045
540 €
5x5 mm
1 mm
Brewster-angle cut
Ng-cut
10%
uncoated
7046
540 €
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