Tm:KYW crystals
Main features
- Broad fluorescence band
- Large emission cross-section
- Relatively low upper-level lifetime
- Custom crystals available upon request
Application examples
- CW and Q-switched lasers emitting near 2 µm for application in surgery, range finding and environmental monitoring
- 2 μm wavelength region femtosecond lasers
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- Description
- Properties
- Absorption and emission curves
- Standard specifications
Double tungstate crystals are optically biaxial and their optical properties have to be described within the frame of optical indicatrix axes (Np, Nm, and Ng). Advantages of Tm-doped KYW crystals include a broad fluorescence band, a large emission cross-section, and a relatively low upper-level lifetime. Such properties combination of properties is very promising for the generation of femtosecond pulses in solid-state laser systems.
| Spectroscopic and thermo-mechanical properties | |
|---|---|
| Absorption peak wavelength | 802 nm |
| Absorption cross-section at peak | 5,2 × 10-20 cm2 |
| Absorption bandwidth at peak wavelength | 5,5 nm |
| Laser wavelength | 1910 nm |
| Lifetime of 3F4 energy level | 1,1 ms |
| Emission cross-section @1910 nm | 1,15 × 10-20 cm2 |
| Refractive index @1040nm | ng=2,05, nm=2,01, np=1,97 |
| Crystal structure | Monoclinic |
| Density | 6,5 g/cm3 |
| Mohs hardness | 4-5 |
| Thermal conductivity | ~3,3 Wm-1K-1 |
| dn/dT | dnm/dT=-9,2 × 10-6 K-1 |
| Thermal expansion coefficient | αp=1,83 × 10-6 K-1, αm=10,29 × 10-6 K-1, αg=15,94 × 10-6 K-1 |
| Typical doping level | ~5 at.% |
| Tm:KYW crystals | |
|---|---|
| Orientation | Ng-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%)@802 nm + AR(R<0,5%)@1900-2000 nm on both faces |
| Laser-induced damage threshold | >10 J/cm2@1900 nm, 10 ns |
| Mount | Unmounted |
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Face dimensions
Length
End faces
Doping
Coatings
SKU
PRICE
QUANTITY
3x3 mm
2 mm
Right-angle cut
5%
AR/AR@802 nm+1900-2000 nm
7840
Request
3x3 mm
2 mm
Brewster cut
5%
uncoated
7841
Request
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