Nd:KGW crystals
Main features:
- Suitable for generation of picosecond light pulses, well suited for diode-pumped lasers
- High storage density and low laser threshold
- Efficient Raman converter
- Custom crystals available upon request
Application examples:
- Diode-pumped Q-switched lasers emitting in the “eye-safe” spectral range for laser rangefinders
- Raman converter
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- Description
- Properties
- Absorption and emission curves
- Standard specifications
Nd:KGW crystal is a good choice for a generation of picosecond laser pulses. These crystals are characterized by a lower stimulated emission cross-section compared to Nd:YAG crystals, therefore provide a better performance in Q-switched operation.
It is worth to mention, that it is possible to use the Nd:KGW laser crystal itself as a Raman converter.
| Spectroscopic and thermo-mechanical properties | |
|---|---|
| Absorption peak wavelength | 811 nm |
| Absorption cross-section at peak | 28 × 10-20 cm2 |
| Absorption bandwidth at peak wavelength | 11 nm |
| Laser wavelength | 1067 nm |
| Lifetime of 4F3/2 neodymium energy level | 130 μs |
| Emission cross-section @1067 nm | 21 × 10-20 cm2 |
| Refractive index @1067nm | ng=2,033, np=1,937, nm=1,986 |
| Crystal structure | Monoclinic |
| Density | 7,25 g/cm3 |
| Mohs hardness | 4-5 |
| Thermal conductivity | ~3 Wm-1K-1 |
| dn/dT | 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 expansion coefficient | αp=1,60 × 10-6 K-1, αm=4 × 10-6 K-1, αg=8,5 × 10-6 K-1 |
| Typical doping level | 2-10 at.% |
| Nd:KGW crystals | |
|---|---|
| Orientation | b(Np)-cut |
| 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%)808-811 nm + AR(R<0,15%)@1067 nm on both faces |
| Laser-induced damage threshold | >10 J/cm2@1067 nm, 10 ns |
| Mount | Unmounted |
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Face dimensions
Length
End faces
Doping
Coatings
SKU
PRICE
QUANTITY
3x3 mm
3 mm
Right-angle cut
5%
AR/AR@808 nm+1067 nm
7796
480 €
3x3 mm
5 mm
Right-angle cut
5%
AR/AR@808 nm+1067 nm
7797
480 €
3x3 mm
5 mm
Right-angle cut
3%
AR/AR@808 nm+1067 nm
7798
480 €
⌀3 mm
5 mm
Brewster-angle cut
5%
uncoated
7799
420 €
⌀3 mm
60 mm
Right-angle cut
3%
AR/AR@1067 nm
7800
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