Features
Undoped YAG Crystal is an excellent material for UV-IR optical windows, particularly for high temperature and high energy density applications. The mechanical and chemical stability is comparable to sapphire crystal, but YAG is unique with non-birefringence and available with higher optical homogeneity and surface quality. Up to 3 YAG boule grown by CZ method, as-cut blocks, windows and mirrors are available from CryLight.
Specifications:
| Orientation: |
< 111 > +/-5deg |
| Diameter Tolerance : |
+0.0 /-0.1mm |
| Thickness Tolerance: |
+/-0.2mm |
| Surface Quality: |
better than 10/5 scratch/dig |
| Parallelism: |
< 30 arcsec |
| Flatness: |
< λ/8 @632.8nm |
| Perpendicularity: |
< 5 arcmin |
| Wavefront Distortion: |
< λ/2 @632.8nm |
| Coating: |
Coating upon Request |
Properties:
| Crystal Structure |
Cubic |
| Density |
4.5 g/cm3 |
| Transmission Range |
250 - 5000 nm |
| Melting Point |
1970 °C |
| Specific Heat |
0.59 W·s /g /K |
| Thermal Conductivity |
14 W/m /K |
| Thermal Shock Resistance |
790 W /m |
| Thermal Expansion |
6.9x10-6 /K |
| dn/dT, @ 633nm |
7.3x10-6 /K-1 |
| Mohs Hardness |
~ 8.5 |
| Refractive Index |
1.8245 @ 0.8mm, 1.8197 @ 1.0mm, |
| 1.8121 @ 1.4mm |
