Er:YAG is a high-quality material for emitting laser with a wavelength of 2940nm--eye safe wavelength. This wavelength can be absorbed by biological tissues, making it widely used in medical laser systems and other fields.
High slope efficiency
Working at room temperature
Eye-safe wavelength
SPECIFICATIONS | |
Concentration | ~50at% |
Orientation | <111> or <100>±5° |
Dimension | Diameter:2~6mm, Length:30~150mm(Customized available) |
Dimension Tolerance | Φ:+0/-0.04mm,L:+0.5/-0mm |
Perpendicularity | ≤5′ |
Parallelism | ≤10″ |
Chamfer | 0.15±0.05mm |
Surface Quality | 10/5(MIL-PRF-13830B) |
Barrel | Fine Ground, Polishing, Grooving |
Flatness | ≤λ/10@632.8nm |
Wavefront Distortion | ≤λ/8 per inch @1064nm |
Extinction Ratio | ≥25dB |
Damage Threshold | >500MW/cm2 |
Coating | R≤0.20%@2940nm |
OPTICAL PROPERTIES | |||
Laser Transition | 4I3/2→4I11/2 | ||
Wavelength | 2940nm | ||
Photon Energy | 6.75×10-20J@2940nm | ||
Emission Cross Section | 3×10-20cm2 | ||
Main Pump Wavelength Range | 600~800nm | ||
PHYSICAL AND CHEMICAL PROPERTIES | |||
Crystal Structure | Tetragonal | ||
Melting Point | 1970°C | ||
Density | 4.56±0.04g/cm3 | ||
Specific Heat | 0.59J/gNaN3 | ||
Elastic Modulus | 310GPa | ||
Young's Modulus | 3.17×104Kg/mm2 | ||
Mohs Hardness | 8.5 | ||
Poisson’s Ratio | 0.3 | ||
Tensile Strength | 0.13~0.26GPa | ||
Thermal Expansion Coefficients | <100>Direction:8.2×10-6/K@0~250°C | ||
<110>Direction:7.7×10-6/K@0~250°C | |||
<111>Direction:7.8×10-6/K@0~250°C | |||
Thermal Conductivity | 14W/m/K@20°C | ||
10.5W/m/K@100°C | |||
Thermal Optical Coefficient | dn/dT=7.3×10-6/k | ||