YAG (undoped)

Undoped YAG is a substrate material that can be used for UV and IR optics.    Sapphire has been the substrate of choice for these applications; however it is difficult to polish Sapphire to a 10-5 scratch-dig finish,and is also slightly birefringent.    YAG is non-birefringent and can be polished to a 10-5 scratch surface quality.
 
■   Advantages
Due to the high strength of YAG, thin windows can be fabricated without warping, allowing them to be used at wavelengths near the UV and IR cutoffs?    The high index of refraction reduces spherical aberrations in lenses by 25% over a typical glass lens
 
■   Applications
Used for UV and IR optics
Especially useful for applications in the 2-3 um region where there is no absorption, this is where glasses are highly absorbent due to the strong H2O band.    Also It is good substrate for both HTS film and III-V nitrides
 
○    For physical property sheet of YAG, please click here.
○    For undoped YAG (100) Rocking curve,please click here.
○    For undoped YAG (110) Rocking curve,please click here.
○    For undoped YAG (111) Rocking curve,please click here.
Structure Lattice
(A)
Melting
Point
oC
Density
g/cm3
Hardness
Mohs
Refractive
index
Transmition
Range
Thermo-
Expans
Damage
Threshold
Thermo-
Conductivity
Dn/dt
C-1
Cubic a=12.01 1950 4.55 8-8.5 1.82@1.06 250-5k nm 6.9x10-6 >15Jcm-2 13 W 10-6 7.4x10-6
 
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