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  AYG CRYSTALS
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YAG Crystals
Undoped YAG (Y3Al5O12) is a new substrate and window material for both UV and IR optics. It

is particularly useful for high temperature and high-energy applications. YAG shows no trace

absorption in 2-3micron region where glasses tend to be highly absorbent due to the strong

H2O2 band.  The mechanical stability of YAG is similar to Sapphire, but .YAG is not

birefringent and is available with high optical homogeneity. Up to 3' YAG boule grown by CZ

method, as-cut blocks, windows and mirrors are available.


Advantages of Undoped YAG Crystals
Non-birefringent
High bulk damage threshold
High index of refraction, facilitating low aberration lens design
High thermal conductivity
Stable mechanical and chemical properties
Low stress and high optical quality
Transmission in 0.25-5.0mm, no absorption in 2-3mm      

Material and Specifications
Orientation
[111] within 5°
Wavefront Distortion
≤ 0.125λ/inch
Rod Sizes
Diameter2~15 mm, Length 3~200 mm 
Upon request of customer
Dimensional Tolerances
Diameter:+0.000"/-0.002", Thickness: 0.04" /-0.00"
Barrel Finish
Ground Finish: 400# Grit
Parallelism
≤30"
Flatness
λ/10
Surface Quality
10-5(MIL-O-13830A)
Chamfer
0.006"±0.002"
AR Coating Reflectivity
≤0.2% (@specified Wavelength)
partial and high refraction coatings are available upon request
Index of Refraction
1.8197@1064nm
Transmission Range
250~5000nm
Damage Threshold
≥15Jcm-2
 
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