| |
Cr4+:YAG
Cr4+:YAG has high damage threshold and is mostly used in passively
Q-switched diode pumped or lamp pumped passive Q-switching materials. Its main
advantages are high damage threshold, and absorptions wavelength of
900nm--1200nm, and peak of around 1060nm with large absorption section.
Properties:
|
Chemical Formula |
Cr4+:Y3A15O12 |
|
Structure |
Cubic |
|
Recovery time |
8.5μs |
|
Mohs Hardness |
8.5 |
|
Density |
4.56g/cm |
|
Orientation |
[100] |
|
Thermal conductivity |
12.13w/m/kV |
|
Refractive index |
1.82 @ 1064nm |
|
Base state absorption cross section |
σs1=4.3x10-18cm2 |
|
Emission state absorption cross section |
σs2=8.2x10-19cm2 |
|
Fluorescence lifetime |
3.4us |
Specifications:
|
Cr4+ concentration |
0.5 mol% ~ 3 mol% |
|
Aperture |
2x2 ~ 14x14mm |
|
Length |
0.1 ~ 12mm |
|
Initial transmission |
10% ~ 99% |
|
Dimension tolerance |
(W ±0.1mm) x (H±0.1mm) x (L + 0.2mm/-0.1mm) |
|
Flatness |
λ/8
@ 633nm |
|
Scratch/Dig |
10/5 per MIL-O-13830A |
|
Parallelism |
better than 20 arc seconds |
|
Perpendicularity |
15 arc minutes |
|
Wavefront distortion |
less than λ/8
@ 633nm |
|
Clear aperture |
>
90% central area |
|
Coating |
AR-coating |
|
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