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Er:YAG
- Various output wavelength
- Superior thermal and optical properties
- An excellent laser crystal at 2.94um
- Well known material for medical applications
PRODUCT DESCRIPTION
Erbium doped Yttrium Aluminum Garnet (Er:Y3Al5O12or Er:YAG) combine various output wavelength with the superior thermal and optical properties of YAG. It is an excellent laser crystal which lasers at 2.94μm. This wavelength is the most readily absorbed into water and hydroxylapatite of all existing wavelengths and is considered a highly surface cutting laser. It is a well known material for medical applications.
Material Properties of Er:YAG crystal
Chemical formula |
Er3+:Y3Al5O12 |
Crystal structure |
cubic |
Melting point: |
1970 °C |
Density, g/cm3 |
5,35 |
Mohs hardness |
8.5 |
Thermal expansion coefficient |
9,5 x 10-6 K-1 (a axis) 4,3 x 10-6 K-1 (b axis) 10,8 x 10-6 K-1 (c axis) |
Thermal conductivity at 25°C |
0.12 W x cm-1x °K-1 |
Loss coefficient at 1064 nm |
0.003 cm-1 |
Laser Properties
Laser Transition |
4I11/2to4I13/2 |
Laser Wavelength |
2940nm |
Fluorescence Lifetime |
90 m s |
Photon Energy |
6.75×10-20J(@2940nm) |
Emission Cross Section |
3×10-20cm2 |
Index of Refraction |
1.79 @2940nm |
Pump Bands |
600~800 nm |
Standard specifications
Dopant concentration, at.% |
Up to 50 |
Orientation: |
within 5° |
Flatness |
< λ/10 measured at 633 nm |
Parallelism |
≤ 30" |
Perpendicularity |
≤ 5 ′ |
Surface Quality |
10-5 per scratch-dig MIL-O-13830A |
Optical Quality: |
Interference fringes ≤ 0.125 λ /inch(@1064nm) |
Extinction ration |
≥ 25dB |
Size: |
Rods:Ф (3-10)mm ×(30-180)mm |
Slabs: |
(3-12)mm ×(6-24)mm ×(60-180)mm |
Dimensional tolerances |
Diameter:+0.000"/-0.05", Length: ± 0.05" Chamfer: 0.07+0.005/-0.00" at 45° |
AR Coating Reflectivity |
≤ 0.2% (@2940nm) |