Cr4+:YAG (Y3Al5O12) is an ideal material for passive Q-switching of Nd:YAG and other Nd and Yb doped lasers in the wavelength range of 0.8 to 1.2 mm.
One of the remarkable features of Cr4+:YAG is high damage threshold (better than 500 MW/cm2).
Passive Q-Switching is preferred for simplicity of manufacturing and operation, low cost and reduced system weight and size.
Basic Properties
|
Crystal Structure |
Cubic |
|
Density |
4.56g/cm3 |
|
Mohs Hardness |
8.5 |
|
Recovery Time |
8.5us |
|
Thermal Conductivity |
12.13W/m/K |
|
Loss Coefficient |
0.003cm-1 |
|
Refractive Index |
1.82 @1064nm |
|
Base State Absorption Cross Section |
4.3x10-18/cm2 |
|
Emission State Absorption Cross Section |
8.2x10-19/cm2 |
|
Fluorescence Lifetime |
3.4us |
Specifications
|
Orientation |
The rod axis is along [100] within5°,[111] and [110] within5° |
|
Cr4+ concentration |
0.5 mol% ~ 3 mol% |
|
Dimension |
2×2~20×20mm |
|
Initial Transmission |
5%~99% |
|
Dimension Tolerance |
±0.1mm |
|
Surface Flatness |
<λ/8@633 nm |
|
Parallelism |
<20 arc seconds |
|
Perpendicularity |
<5 arc minutes |
|
Surface Quality |
20/10 Scratch and Dig |
|
Clear Aperture |
>95% |
|
Coating |
AR/HR/PR coating upon customer’s request |
Note: When ordering Cr4+:YAG crystal, please specify the aperture, initial transmission(To) and coatings.
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