Erbium dotiertes Yttrium-Aluminium-Granat

Material
Er:YAG

 

Erbium doped Yttrium Aluminum Garnet (Er:Y3Al5O12 or Er:YAG) laser crystals have large advantage in the 2.94 µm wavelength range where the laser beam is strongly absorbed in water and, therefore, is interesting for mecial applications. Er:YAG has high optical quality, low scattering losses, higher output, stable chemical and mechanical properties. It is ideal for hard tissue removal. Er:YAG is a crystal with a wide pump band of 600nm-800nm. All these properties make Er:YAG crystals excellent for such applications like surgery, dentistry and other medical fields.

Properties
Optical properties
Lasing wavelength in nm
2940
Refractive index @ 2940 nm
1,79
Damage threshold in MW/cm2
>500
Fluorescence lifetime in ms
0,23 (high doped)

2 ∼ 5 (low doped)

Physical properties
Density in g/cm3
5,35
Melting point in °C
1970
Crystal structure
cubic
Thermal conductivity in W/(cm · K)
0,12
Thermal expansion in 1/K
7,7 · 10-6, <111>

8,2 · 10-6, <100>

Mohs hardness
8,5
Dopant concentration in %
0,15 ‐ 50
Lattice constant in Å
12,0
Dielectric constant
11,7
Young's Modulus (E) in Gpa
317
Shear Modulus (G) in GPa
54,7
Poisson's ratio
0,25