Er:YAG is a laser crystal with good comprehensive properties. It excites a 2940 nm laser for medical and dental applications, an excellent laser crystal with a laser wavelength of 2.94 μm.
Main features:
♦ Excellent optical quality
♦ High output and damage thresholds
♦ High efficiency slope and low scattering loss
♦ High doping concentration
♦ Excellent thermal and optical properties
Typical applications:
♦ Glaucoma Surgery
♦ 2940 nm laser penetrating keratoplasty
♦ Plastic Surgery and Dentistry
Transparency curve of Er:YAG
Technical Parameters
| Argument Name | Values and Ranges |
Size tolerance | Diameter: +0.000"/-0.002", Length: ± 0.02" |
Clear aperture | > 95% |
Finish | 10/5 |
Flatness | λ/8@633nm |
Wavefront distortion | ≤ λ0.125@1064nm |
Parallelism | ≤ 10 arc sec |
Perpendicularity | ≤ 5 arc min |
Doping concentration | ~50% |
Anti-reflection membrane system | ≤ 0.25% (@2940nm) |
| Quality warranty period | 1 year (with normal use) |
Crystal Structure and Physical Properties
Argument Name | Values and Ranges |
Crystal structure | Orthorhombic Crystal - Pbnm |
Molecular mass | 163.884 |
Shape | Translucent crystalline solid |
Laser wavelength | 2940 nm |
| Melting point | 1870°C |
Density | 5.35 g/cm3 |
| Specific heat capacity | 0.557 J/g·K |
Photon energy | 6.75 × 10-20 J(@2940nm) |
Coefficient of thermal expansion | 2.32 × 10-6 K-1 (a-axis), 8.08 × 10-6 K-1 (b-axis), 8.7 × 10-6 K-1 (c-axis) |
Launch cross-section | 3 × 10-20 cm2 |
Refractive index | 1.79 @2940nm |
Pump width | 600~800 nm |
Standard Size
| Product NO. | Diameter (mm) | Length (mm) | Doping% | Edge of the end |
| E-Y-301 | 3 | 53 | 0.9 | 0/0 |
| E-Y-302 | 3 | 65 | 0.8 | 0/0 |
| E-Y-303 | 3 | 65 | 1.1 | 0/0 |
| E-Y-401 | 4 | 65 | 0.8 | 3/3 Parallel |
| E-Y-402 | 4 | 65 | 1.1 | 3/3 Parallel |
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