Er:YAG
Laser wavelength: 2940nm; chemical formula: Er3+:Y3Al5O12; melting point: 1970 °C; density: 5.35 g/cm3; orientation: <111>± 5°; flatness: < λ/10 @633nm; parallelism: ≤ 30"; perpendicularity: ≤ 5 ′; surface finish: 10/5. Er:YAG is an excellent 2.94μm laser crystal widely used in medical laser systems and other fields. The source describes it as the most important active material for 3mm lasers, stating that water absorption at 3mm is 100 times that at 2mm and 100 times that at 1mm, giving 3mm lasers broad medical significance. These mm units are retained as written. The 2.94μm Er:YAG laser is widely used in surgery, cosmetic dermatology, and dentistry. Spectral properties: refractive index 1.79 @2940nm; pump wavelength 600~800 nm.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Chemical Formula | Er3+:Y3Al5O12 |
| Crystal Structure | Cubic |
| Melting Point | 1970 °C |
| Density | 5.35 g/cm3 |
| Mohs Hardness | 8.5 |
| Coefficient of Thermal Expansion | 9.5 x 10-6 K-1 (a axis), 4.3 x 10-6 K-1 (b axis) |
| Coefficient of Thermal Expansion | 10.8 x 10-6 K-1 (c axis) |
| Thermal Conductivity [25°C] | 0.12 W x cm-1x °K-1 |
| Single-Pass Loss [1064nm] | 0.003 cm-1 |
| Laser Transition | 4I11/2 to 4I13/2 |
| Laser Wavelength | 2940nm |
| Fluorescence Lifetime | 90ms |
| Photon Energy [2940nm] | 6.75×10-20J(@2940nm) |
| Emission Cross-Section | 3×10-20cm2 |
| Er Dopant Concentration | up to 50% |
| Orientation | ± 5° |
| Flatness [633nm] | < λ/10 @633nm |
| Parallelism | ≤ 30" |
| Perpendicularity | ≤ 5 ′ |
| Surface Finish [MIL-O-13830A] | 10/5 Scratch / Digper MIL-O-13830A |
| Interference Fringes [1064nm] | ≤0.125 λ /inch(@1064nm) |
| Extinction Ratio | ≥ 25dB |
| Dimensions - Rod | Ф (3～10)mm×(30～180)mm |
| Dimensions - Slab | (3～12)mm×(6-24)mm×(60～180)mm |
| Dimensions | According to Customer Requirements |
| Dimensional Tolerance - Diameter | +0.00"/-0.05"mm |
| Dimensional Tolerance - Length | ± 0.05" |
| Dimensional Tolerance - Chamfer [45º] | <0.1 mm @ 45º |
| Anti-Reflection Coating System [2940] | ≤ 0.2% (@2940) |
Key Features
Datasheet
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Supplier Information
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