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 New Rise Optics.
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.
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 |
|
Note: other high-precision windows, AR- and HR-coatings are available upon
request.
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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