Er:YAG Crystals
The wavelength of Er: YAG laser is 2.94 microns, Compared with 10.6 microns of carbon dioxide laser, this wavelength of laser is more easily absorbed by water, Ca, P, etc. It is mostly used for incision and removal of water-rich body soft tissue and osteotomy, and its performance is greatly improved, better than CO2 laser knives.
At present, there are many studies on the use of Er:YAG lasers to replace high-speed turbo dental drills in the treatment of periodontal disease, and implement cutting of the hard tissue of the tooth. This aspect has application prospects for the removal of joint loose bodies, inflammatory synovium removal, meniscectomy, and Percutaneous lumbar disc decompression, etc.
Er:YAG Crystals (Erbium-doped Yttrium Aluminium Garnet ) is an excellent laser crystal of 2.94μm. Its widely applied in medical laser systems of laser surgery, dental, otolaryngology, and Laser cosmetology etc.
Advantages:
- Eye safe
- High slope efficiency
- Working well at room temperature
- Wide pumping band 600nm-800nm
| wdt_ID | Attributes | Values |
|---|---|---|
| 1 | Concentration | Er 20at% Er 50at% |
| 2 | Orientation | ＜111＞±5° |
| 3 | Dimension | diameter Φ2~10mm Length 30-160mm |
| 5 | Parallelism | ≤10" |
| 6 | Perpendicularity | ≤5' |
| 7 | Surface Quality | 10/5 (MIL-O-13830A) |
| 8 | Flatness | λ/10@632.8nm |
| 9 | Extinction ratio | ≥25dB |
| 10 | Wavefront distortion | ≤λ/8 per inch |
| 11 | Barrel finishing | Ground finish 400# Grit |
| 12 | Coating | AR/AR@2940nm, R≤0.25% |
| 13 | Damage threshold | ≥5J/cm² 10ns, 10Hz |
| 14 | Laser wavelength | 2940nm |
| 15 | Pump bands | 600nm~800nm |
| wdt_ID | Attributes | Values |
|---|---|---|
| 1 | Photon Energy | 6.75x10⁻²⁰J (@2940nm) |
| 2 | Emission Cross Section | 3x10⁻²⁰cm² |
| 3 | Refractive index | 1.79@2940nm |
| 4 | Crystal Structure | Cubic |
| 5 | Modules of Elasticity | 310GPa |
| 6 | Young’s Modulus | 3.17x104Kg/mm² |
| 7 | Lattice Constant | a=12.013 Å |
| 8 | Melting Point | 1970℃ |
| 9 | Moh Hardness | 8.5 |
| 10 | Density | 4.56g/cm³ |
| 11 | Specific Heat (0-20) | 0.59J/g.cm³ |
| wdt_ID | Attributes | Values |
|---|---|---|
| 1 | Thermal Expansion Coefficient | [100]8.2×10⁻⁶/k(0~250℃) [110]7.7×10⁻⁶/k(0~250℃) [111]7.8×10⁻⁶/k(0~250℃) |
| 10 | Thermal Conductivity | 14W/m/K(@20℃) 10.5W/m/K(@100℃) |
| 11 | Thermal Coefficient(dn/dT) | Dn/dT=7.3*10⁻⁶/k |
| 12 | Thermal Shock Resistance | 790W/m |
| 13 | Solubility | Water: Insoluble Common Acids: Slightly |
Er:YAG Crystals Main Application
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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
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Channel waveguide eye-safe (~1,6 µm) in-band pumped lasers with diffraction-limited output for long-distance telemetry and ranging
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CW and Q-switched ~3 µm lasers for oral surgery, dentistry, implant dentistry, and otolaryngology
| wdt_ID | SKU | Type of crystals | Dimensions, mm | Coatings, nm |
|---|---|---|---|---|
| 1 | ER0101 | Er:YAG | 3X95 | A(↑):HR@2940nm(R＞99.8%); B:PR@2940nm(R=95%) |
| 29 | ER0102 | Er:YAG | 5X100 | AR/AR@2940nm |
| 30 | ER0103 | Er:YAG | 4X100 | AR/AR@2940nm |
| 31 | ER0104 | Er:YAG | 3X52 | S1:PR@2940nm(R=91-90%); S2(↑):HR@2940nm(R＞99.9%)(No transmission) |