Undoped Yttrium Aluminium Garnet (Y3Al5O12 or YAG) is a synthetic crystalline material that has a cubic crystal structure. It is a transparent material that is commonly used as a laser host material and in optical applications, such as lenses, prisms, and windows.
YAG has a high thermal conductivity, which makes it useful in high-power laser applications, where it can dissipate heat generated by the laser. It also has a wide transmission range, from the ultraviolet to the infrared regions of the electromagnetic spectrum, which makes it useful in various optical applications.
In laser applications, YAG is often doped with rare-earth ions, such as neodymium (Nd), erbium (Er), or ytterbium (Yb), to create solid-state lasers. These lasers are widely used in industrial, medical, and military applications, such as laser cutting, welding, and marking, as well as in spectroscopy and remote sensing.
Undoped YAG is also used as a scintillator material in radiation detection applications, where it converts ionizing radiation into visible light, which can be detected by a photodetector. It is also used as a substrate material for thin film deposition, particularly in the growth of epitaxial films of other materials, such as gallium nitride (GaN), for use in electronic and optoelectronic devices.
|Grain size||50 - 70 µm|
|Density, g cm-3 @ 298K||5.27|
|Chemical Purity, %||99.999|
|10% transmission limits (t=6mm)||0.5 - 22 µm|
|Index of refraction inhomogeneity (Dn/n), ppm @ 0.6328µm||< 3|
|Thermo-optic coefficient, dn/dT(298-358K), 1/K @ 0.6328µm||1.07 x 10-4|
|(1/K @ 1.15µm)||7 x 10-5|
|(1/K @ 3.39µm)||6.2 x 10-5|
|(1/K @ 10.6µm)||6.1 x 10-5|
|Bulk absorption coefficient, 1/cm @ 1.3µm||5.0 x 10-3|
|(1/cm @ 2.7µm)||7.0 x 10-4|
|(1/cm @ 3.8µm)||4.0 x 10-4|
|(1/cm @ 5.25µm)||4.0 x 10-4|
|(1/cm @ 10.6µm)||5.0 x 10-4|
Indices of Refraction (n) as a function of wavelength at room temperature (20°C)
|Wavelength (µ)||n||Wavelength (µ)||n||Wavelength (µ)||n||Wavelength (µ)||n|