Undoped YAG crystal 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 crystal shows no trace absorption in the 2-3 mm H2O band. The mechanical and chemical stability of YAG crystal is similar to Sapphire. Sapphire is slightly birefringence, but YAG crystal is not birefringence and is available with high optical homogeneity.

Wide Transmission Range:
Useful from 250nm to 5000 nm
No absorption in 2-3 mm

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