Highly doped (50%) Erbium YAG is a well-known laser crystal emitting radiation at 2940nm, commonly used in medical applications due to strong water and hydroxapatite absorption.

Low doped (< 1%) Erbium YAG crystals are used to generate high power and high energy 1.6 micron „eye-safe“ emission.


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 50% Er:YAGLow Doped (0.1% – 1.0%) Er:YAG
Emission Wavelength2.94 μm1.6 μm
Laser Transition4I11/2 → 4I13/24I13/2 → 4I15/2
Flouresence Lifetime230 μs2+-5 ms
Pump Wavelength600-800 nm1.5 μm


Diameter Tolerance+- 0.05 mm
Crystal Orientation<111> within 5°
Length Tolerance± 0.2 mm
Perpendiculairity of End Faces (plano/plano)5 arc-minutes
Parallelism of End Faces (plano/plano)10 arc-seconds
Flatness0.1 wave maximum
(plano/plano)over 90% of aperture
Surface Finish at 5X20-10 (scratch & dig)
Barrel Finish400 grit
End Face Bevel0.075 mm to 0.12 mm at 45° angle
Coefficient of Thermal Expansion6.14 x 10-6 K-1
Thermal Diffusivity0.041 cm2 s-2
Thermal Conductivity11.2 W m-1 K-1
Specific Heat (Cp)0.59 J g-1 K-1
Thermal Shock Resistant800 W m-1
Refractive Index @ 632.8 nm1.83
dn/dT (Thermal Coefficient of Refractive Index) @ 1064nm7.8 10-6 K-1
Molecular Weight593.7 g mol-1
Melting Point1965°C
Density4.56 g cm-3
MOHS Hardness8.25
Young’s Modulus335 Gpa
Tensile Strength2 Gpa
Crystal StructureCubic
Standard Orientation<111>
Y3+ Site Symmetry8D2
Lattice Constanta=12.013 Å
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SKUDoping %CutCoatingDimensions mmPriceQuantityAdd to Cart
Er:YAG - 148750111AR 2940DIA 5 x 1001,550.00
Er:YAG - 148850111AR 2940DIA 5 x 10660.00
Er:YAG - 148950111AR 29403 x 3 x 3300.00
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