YAG Undoped YAG is a new substrate and window material that can be used for both UV and IR optics. It is particularly useful for high temperature and high-energy applications. YAG shows no trace absorption in the 2-3mm region where glasses tend to be highly absorbent due to the strong H 2 O band. Sapphire is also slightly birefringence. The mechanical and chemical stability of YAG is similar to Sapphire, but YAG is not birefringence and is available with high optical homogeneity. Useful from 250nm to 5000nm No absorption in the 2-3mm Excellent Thermal and Opto-Mechanical Properties: High thermal conductivity, 10 times better than glasses Extremely hard and durable Non-birefringence Stable mechanical and chemical properties High bulk damage threshold High index of refraction, facilitating low aberration lens design Properity:

Mohs hardness	8-8.5
Thermal expansion	6.9´10 -6 ℃ -1
Thermal conductivity	13W×m -1 ×K -1
dn/dt	7.4´10 -6 ℃ -1
Diameter	10~120mm
Length	150mm
Wavefront distortion	l/6 each inch

Main Specification:

Diameter Tolerance	±0.1mm(standard)
Length Tolerance	±0.1mm(standard),
Perpendicularity	<15'
Parallelism	<1'
Flatness	l /8
Scratch-Dig	20/10