Er:YAG crystals
Main features
- Isotropic crystal (cubic symmetry)
- High thermal conductivity
- Strong absorption bandwidth near 1470 nm corresponding to InGaAsP/InP laser diode emission
- Emission spectra at 1617 nm is free from absorption in the atmosphere
- Custom crystals available upon request
Application examples
- CW and Q-switched eye-safe (~1,6 μm) in-band pumped lasers with nearly quantum defect limited efficiency for military applications including LIDAR, telemetry, or active imaging
- Channel waveguide eye-safe (~1,6 µm) in-band pumped lasers with diffraction-limited output for long-distance telemetry and ranging
- CW and Q-switched ~3 µm lasers for oral surgery, dentistry, implant dentistry, and otolaryngology
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- Description
- Properties
- Absorption and emission curves
- Standard specifications
Er3+:YAG crystal is an attractive laser material for eye-safe emission at wavelengths of 1617 and 1645 nm which can be resonantly diode-pumped into the upper laser manifold at 1470 nm and 1532 nm. Due to the low quantum defect, high slope efficiencies of >80% can be achieved with direct fiber laser or InGaAs/InP pumping. By using heavily erbium-doped (~50 at.%) YAG crystal efficient CW laser operation at ~3 µm can be obtained.
| Spectroscopic and thermo-mechanical properties | |
|---|---|
| Absorption peak wavelength | 960, 1470, 1532 nm |
| Absorption cross-section at a peak wavelength | ~1,0 × 10-20 cm2 @ 1470 nm |
| Absorption bandwidth at a peak wavelength | ~2-3 nm @ 1470 nm |
| Laser wavelength | 1617, 1645, 2940 nm |
| Lifetime of 4I13/2 and I11/2 erbium energy level | 6,0 ms (4I13/2), 0,1 ms (I11/2) |
| Emission cross-section at a wavelength | 2,6 × 10-20@2940 cm2 5,2 × 10-21@1645 cm2 |
| Refractive index @1064 nm | 1,82 |
| Crystal structure | Cubic |
| Density | 4,56 g/cm3 |
| Mohs hardness | 8,5 |
| Thermal conductivity | ~13 Wm-1K-1 |
| dn/dT @1064 nm | 7,8 × 10-6 K-1 |
| Thermal expansion coefficient | ~7 × 10-6 K-1 |
| Typical doping level | <1 at.% (for ~1,6 µm lasers) <50 at.% (for ~3 μm lasers) |
| Er:YAG crystals | |
|---|---|
| Orientation | [111] |
| 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 |
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Face dimensions
Length
End faces
Doping
Coatings
SKU
PRICE
QUANTITY
5x5 mm
3 mm
Brewster cut
0,15%
uncoated
7852
Request
5x5 mm
2 mm
Brewster cut
50%
uncoated
7853
Request
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