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Er:Yb:YAB
- At present Er:Yb:YAl3(BO3)4 (Er:Yb:YAB) crystal has been considered as an excellent 1.55μm laser material, because it has high thermal conductivity, high Yb3+/Er3+ energy transfer efficiency and weak upconversion loss.Relative to the Er3+ /Yb3+ co-doped phosphato glass,1.53 μm continuous-wave(cw) laser with higher maximum output power and higher slope efficiency was realized in the Er:Yb:YAl3(BO3)4 crystal.Due to the strong penetration ability to smoke, excellent transparency in atmosphere and high sensitivity for the room-temperature Ge as well as InGaAs photodiodes, eye-safe 1.55 μm laser can be widely used in many applications, such as LiDAR laser ranging, three-dimensional imaging and target recognition.
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Basic Properties of Er:Yb:YAl3(BO3)4 Crystal
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Chemical Formula |
Er:Yb:YAl3(BO3)4 |
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Crystal Structure |
D73-R32, a=b=9.293Å，c=7.245Å |
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Atomic Density |
0.55×1020 cm-3 (1 at% Yb3+ or Er3+) |
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Hardness |
7.5 |
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Density |
3.7 g/cm³ |
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Refraction Index |
1.75(no); 1.68(ne) @1550nm |
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Thermal Expansion Coefficient |
⊥c: 2.0×10-6 K-1 , //c: 9.7×10-6 K-1 (25 at% Yb3+) ⊥c: 1.2×10-6 K-1 , //c: 8.5×10-6 K-1 (25 at% Yb3+) |
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Conductivity |
4.7 W m-1 K-1 |
Performance Parameter Table
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Er:Yb:YAl3(BO3)4 |
Er3+/Yb3+co-doped phosphato glass |
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Pumping wavelength |
976 nm |
976 nm |
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Peak absorption cross-section |
3×10-20 cm2 (σ polarization) |
1×10-20 cm2 |
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FWHM of absorption band |
19 nm |
10 nm |
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Peak fluorescence wavelength |
1530 nm |
1533 nm |
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Central wavelength of luminescence |
470 nm |
470 nm |
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Peak emission cross-section |
2×10-20 cm2 (σ polarization) |
0.8×10-20 cm2 |
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Fluorescence lifetime |
0.3 ms |
8 ms |
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Refraction index |
1.75 (no) |
1.54 |
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Conductivity |
4.7 W m-1 K-1 |
0.8 W m-1 K-1 |
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Maximum output power |
＞1 W |
350 mW |
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Maximum slope efficiency |
＞ 30% |
＞30 % |
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Lasing wavelength |
1520-1600 nm |
1528-1565 nm |
Warranty on Er:Yb:YAl3(BO3)4 Specifications
■ Dopant concentration：0.1-3at.%Er3+，5-30at.%Yb3+
■ Cross-section：(1×1)-(15×15)mm2
■ Thickness：0.5-10mm
■ Dimension Tolerance：±0.1mm
■ Transmitting wavefront distortion：≤λ /8@633nm
■ Surface quality：10/5 （MIL-PRF-13830B）
■ Flatness：≤λ /6@633nm
■ Parallelism：better than 10 arc sec
* We can also provide you Er:Yb:GdAl3(BO3)4 and Er:Yb:LuAl3(BO3)4 similar with tech specs aboved.
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