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20170718075547
20170718075547
  • 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

Chemical Formula

Er:Yb:YAl3(BO3)4

Crystal Structure

D73-R32, a=b=9.293Å,c=7.245Å

Atomic Density

0.55×1020 cm-3 (1 at% Yb3+ or Er3+)

Hardness

7.5

Density

3.7 g/cm³

Refraction Index

1.75(no); 1.68(ne) @1550nm

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+)

Conductivity

4.7 W m-1 K-1

 

                                                 Performance Parameter Table

 

Er:Yb:YAl3(BO3)4

Er3+/Yb3+co-doped phosphato glass

Pumping wavelength

976 nm

976 nm

Peak absorption cross-section

3×10-20 cm2 (σ polarization)

1×10-20 cm2

FWHM of absorption band

19 nm

10 nm

Peak fluorescence wavelength

1530 nm

1533 nm

Central wavelength of luminescence

470 nm

470 nm

Peak emission cross-section

2×10-20 cm(σ polarization)

0.8×10-20 cm2

Fluorescence lifetime

0.3 ms

8 ms

Refraction index

1.75 (no)

1.54

Conductivity

4.7 W m-1 K-1

0.8 W m-1 K-1

Maximum output power

>1 W

350 mW

Maximum slope efficiency

> 30%

>30 %

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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