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Applications |
◆Mostly used in passively Q-switching diode pumped or lamp pumped passive Q-switching materials. |
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Features |
◇Chemical stability |
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◇UV resistant |
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◇Good thermal conductivity |
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◇High damage threshold (> 500 MW/cm2) |
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◇Absorptions wavelength of 900nm--1200nm |
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◇Peak of around 1060nm with large absorption section |
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Main Specification |
Material |
Chromium doped yttrium aluminum garnet |
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Cr4+ dopant concentration |
0.5 mol% ~ 3 mol% |
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Diameter |
2×2 ~ 14×14mm Length 0.1 ~ 12mm |
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Dimensional Tolerance |
(W±0.1mm) × (H±0.1mm) × (L + 0.2mm/-0.1mm) |
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Angle tolerance |
Δθ<±0.5°; Δφ< ±0.5° |
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Coating |
AR coatings reflectivity <0.2 % @ 1064 nm |
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Orientation |
[100]+/-10° |
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Initial transmission |
10% ~ 99% |
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Wavefront Distortion |
< λ/8 @ 633nm |
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Surface quality Scratch/Dig |
10/5 Scracth/dig per MIL-O-13830A |
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Parallelism |
<20 arc seconds |
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Perpendicularity |
5 arc min |
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Surface flatness |
<λ/10 @ 632.8 nm |
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Clear aperture |
> 90% central area |
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Chamfer |
<0.1 mm × 45° |
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Damage Threshold |
>500 MW/cm2 |
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Physical and Chemical Properties |
Chemical Formula |
Cr4+:Y3A15O12 |
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Crystal Structure |
Cubic garnet |
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Dimensional tolerances |
+0/-0.1 mm |
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Recovery time |
8.5μs |
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Density |
4.56g/cm |
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Mohs Hardness |
8.5 Mohs |
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Refractive Index |
1.82 @ 1064nm |
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Thermal Conductivity |
12.13w/m/kv |
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Optical properties |
Base state absorption cross section |
σs1=4.3x10-18cm2 |
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Emission state absorption cross section |
σs2=8.2×10-19cm2 |
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Fluorescent Lifetime |
3.4μs |
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