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Er:YAG for Medical and Dentistry Laser at 2.94μm
Advantages of Er:YAG Crystals Made By WISOPTIC
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
Sizes from 3 mm to 10 mm diameter, with lengths up to 150 mm long
Erbium doped Yttrium Aluminum Garnet (Er:Y3Al5O12 or Er:YAG) combine
various output wavelength with the superior thermal and optical
properties of YAG. The emission wavelength of Er:YAG with doping concentration of 50% is
2940nm, which is at the position of water absorption peak and can be
strongly absorbed by water molecules. Therefore, Er:YAG laser is widely used in
plastic surgery and dentistry.
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
Dopant Ion
Er3+ concentration range | 0.1 - 100 atomic % |
Dopant Ion Density @ 1 atomic % | |
Y3+ Site | 1.38 x 1022 cm-3 |
Al3+ Site (IV) | 1.38 x 1022 cm-3 |
Al3+ Site (VI) | 0.92 x 1022 cm-3 |
Common Operating Specs
50% Er:YAG | Low Doped (0.1% - 1.0%) Er:YAG | |
Emission Wavelength | 2.94 μm | 1.6 μm |
Laser Transition | 4I11/2 → 4I13/2 | 4I13/2 → 4I15/2 |
Flouresence Lifetime | 230 μs | 2+/-5 ms |
Pump Wavelength | 600-800 nm | 1.5 μm |
Physical Properties
Coefficient of Thermal Expansion | 6.14 x10-6 K-1 |
Thermal Diffusivity | 0.041 cm2•s-2 |
Thermal Conductivity | 11.2 W•m-1 •K-1 |
Specific Heat (Cp) | 0.59 J•g-1•K-1 |
Thermal Shock Resistant | 800 W•m-1 |
Refractive Index @ 632.8 nm | 1.83 |
dn/dT (Thermal Coefficient of Refractive Index) @ 1064nm | 7.8 10-6•K-1 |
Molecular Weight | 593.7 g•mol-1 |
Melting Point | 1965°C |
Density | 4.56 g•cm-3 |
MOHS Hardness | 8.25 |
Young’s Modulus | 335 Gpa |
Tensile Strength | 2 Gpa |
Crystal Structure | Cubic |
Standard Orientation | <111> |
Y3+ Site Symmetry | 8D2 |
Lattice Constant | a=12.013 Å |
