Er:YAG Laser Rods Laser Crystals

Product Item : QiM52-003
Category： Laser Crystal Rods
Er doping concentration: 50% / 20%
Flatness: ＜λ/10 @632.8nm
Parallelism: ≤10″
Surface smoothness: 10/5 (MIL-O-13830A)
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Er:YAG Laser Rods Laser Crystals

Er:YAG crystal is an excellent 2.94 μm laser crystal, which is widely used in laser medical systems and other fields. Er:YAG crystal is the most important working substance for 3μm lasers. The absorption coefficient of water for light with a wavelength of 3μm is 100 times greater than that of 2μm and 100 times greater than that of 1μm. Therefore, 3μm laser has a wide range of applications in medicine. 2.94μm Er:YAG laser has been widely used in the fields of surgery, dermatology, dentistry, and other treatments in the medical field.

Product Parameters

Parameters	Value
Er doping concentration	50% / 20%
Orientation	＜111＞±5°
Flatness	＜λ/10 @632.8nm
Parallelism	≤10″
Verticality	≤5′
Surface smoothness	10/5 (MIL-O-13830A)
Optical quality	Interference fringe: ≤0.125λ/Inch @1064nm Extinction ratio: 0≥25db
Dimension	Rod: Ф(3-10)mm x (30-180)mm(L) Bar: (3-12)mm x (6-24)mm x (60-180)mm(L) Customized according to customer’s requirement
Tolerance	Diameter: +0.00/-0.05mm Length: ±0.5mm
Chamfering	≤0.1mm@45°
Anti reflective coating	R≤0.2%@2940nm

Physical Properties

Crystal structure	Cubic
Lattice constant	12.01A
Melting point	1970℃
Mohs hardness	8.5
Elastic modulus	310GPa
Poisson's ratio	0.3 (est.)
Tensile strength	0.13`0.26GPa
Coefficient of thermal expansion	[100] Direction:8.210-6/(0~250℃) [110] Direction:7.710-6/(0~250℃) [111] Direction:7.8*10-6/(0~250℃)
Thermal conductivity	14W/m/K@20K
Thermal conductivity	10.5W/m/K@100K
Thermal shock resistance	790W/m
Thermo-optic coefficient (dn/dT)	Dn/dT=7.3*10-6/k
Solubility	Insoluble in water, slightly soluble in common acids