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 Red Optronics.
Features:
- Transmission in 0.25-5.0mm, no
absorption in 2-3mm
- Extremely hard and durable
- High thermal conductivity
- High bulk damage threshold
- High index of refraction and Non-birefringence.
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Main Specifications
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|
| Orientation |
[111] within 5° |
| Diameter |
+/-0.1mm |
| Thickness |
+/-0.2mm |
| Flatness |
better than l/8@633nm |
| Parallelism |
better than 30'' |
| Perpendicularity |
better than 5' |
| Scratch-Dig |
10-5 per MIL-O-1383A |
| Wavefront Distortion |
better than l/2 per
inch@1064nm |
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Note: other high-precision windows, AR- and HR-coatings are available upon
request.
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Physical Properties
|
|
| Crystal structure |
Cubic |
| Density |
4.5g/cm3 |
| Transmission Range |
250-5000nm |
| 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 |
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