Er:YLF crystals
Main features
- A low phonon frequency
- Long lifetimes of the laser emitting levels
- Wide transparency range (from the VUV to the 10 µm region)
- Negative thermo-optic coefficient
- Custom crystals available upon request
Application examples
- CW and Q-switched ~3 μm lasers for oral surgery, dentistry, implant dentistry, and otolaryngology
- Up-conversion visible lasers for display technology, medicine (diagnosis and treatment)
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- Description
- Properties
- Absorption and emission curves
- Standard specifications
Er3+:YLF crystals are characterized by a low phonon frequency, which decreases the probability of non-radiative multi-phonon relaxations, therefore increases the luminescence quantum efficiency. A long lifetime of laser emitting levels allow higher energy storage, which is useful for the Q-switch lasing regime. A high bandgap along with low phonon energy leads to a very wide transparency range, which is possibly from VUV to 10 µm region. Negative Er3+:YLF thermo-optic coefficient is an advantage since it reduces the thermal-lensing effect and improves beam shape as well as stability at high average pump power.
Spectroscopic and thermo-mechanical properties | |
---|---|
Absorption peak wavelength | 972 nm |
Absorption coefficient at a peak wavelength | 28 cm-1 |
Absorption bandwidth at a peak wavelength | ~1 nm |
Laser wavelength | 2810 nm |
Lifetime of 4I11/2 erbium energy level | 4 ms |
Emission cross-section @2800 nm | 1,5 × 10-20 cm2 |
Refractive index @2070 nm | n0=1,442, ne=1,464 |
Crystal structure | Tetragonal |
Density | 3,95 g/cm3 |
Mohs hardness | 5 |
Thermal conductivity | ~5 Wm-1K-1 |
dn/dT | -2 × 10-6 (//a) K-1, -4,1 × 10-6 (//c) K-1 |
Thermal expansion coefficient | 8 × 10-6 K-1 |
Typical doping level | 15 at.% |
Er: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/10@632,8 nm |
Coatings | Uncoated, coatings available upon request |
Mount | Unmounted |
Order your item
Face dimensions
Length
End faces
Doping
Coatings
SKU
PRICE
QUANTITY
5x5 mm
5 mm
Brewster cut
15%
uncoated
7842
540 €
⌀5 mm
5 mm
Brewster cut
15%
uncoated
7843
540 €
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