Pr:YLF crystals
Main features
- High absorption and emission cross-sections (~10-19 cm2)
- Good overlapping of the absorption band in the blue spectral region with the emission lines of the InGaN laser diodes and 2ω-OPSL
- Lines of the InGaN laser diodes and 2ω-OPSL
- Custom crystals available upon request
Application examples
- Diode-pumped solid-state lasers for precise and efficient processing of metals such as copper or gold, entertainment industry and science
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- Description
- Properties
- Absorption and emission curves
- Standard specifications
Very few laser materials have the necessary properties for the realization of lasing in the visible spectral range. Trivalent praseodymium (Pr3+) is known to be an interesting laser ion for use with solid-state lasers in the visible spectral range because of its energy levels scheme, providing several transitions in the red (640 nm, 3P0 to 3F2), orange (607 nm, 3P0 to 3H6), green (523 nm, 3P0 to 3H5), and dark red (720 nm, 3P0 3F3+3F4) spectral regions.
Pr3+:YLF has been found to be a promising laser material for producing visible lasers directly and UV lasers through intracavity second-harmonic generation.
Spectroscopic and thermo-mechanical properties | |
---|---|
Absorption peak wavelength | 444 nm |
Absorption cross-section at peak | 8 × 10-20 cm2 |
Absorption bandwidth at peak wavelength | ~5 nm |
Laser wavelength | 523 nm, 607 nm, 639 nm, 698 nm, 721 nm |
Lifetime of 3P0 energy level | 50 μs |
Emission cross-section | 20 × 10-20 cm2 |
Refractive index @1064 nm | no=1,448, ne=1,470 |
Crystal structure | tetragonal |
Density | 3,95 g/cm3 |
Mohs hardness | 5 |
Thermal conductivity | 6 Wm-1K-1 |
dn/dT | -5,2 × 10-6 (||c) K-1, -7,6 × 10-6 (||a) K-1 |
Thermal expansion coefficient | ~16 × 10-6 K-1 |
Typical doping level | <1 at.% |
Pr:YLF crystals | |
---|---|
Orientation | a-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/8@632,8 nm |
Wavefront distortion | λ/4@632,8 nm |
Coatings | AR(R<1%)@440-444 nm + AR(R<0,6%)@500-650 nm + AR(R<1%)@650-725 nm on both faces |
Laser induced damage threshold | >5 J/cm2@532 nm, 10 ns |
Mount | Unmounted |
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Face dimensions
Length
End faces
Doping
Coatings
SKU
PRICE
QUANTITY
2x2 mm
6 mm
Right-angle cut
0,5%
AR/AR@440-444 nm+500-725 nm
7793
480 €
3x3 mm
6 mm
Right-angle cut
0,5%
AR/AR@440-444 nm+500-725 nm
7794
540 €
⌀5 mm
6 mm
Right-angle cut
0,5%
AR/AR@440-444 nm+500-725 nm
7795
640 €
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