Er, Yb:YAB

Er, Yb:YAB
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CRYLINK’s erbium, ytterbium co-doped aluminum borate yttrium crystal products, also known as Er, Yb:YAB. It is a kind of laser glass product with excellent comprehensive performance.

It is widely used in telecommunication systems, radar monitoring, and laser fields. It has the following characteristics:

  • High thermal conductivity
  • High absorption and emission cross-sections
  • Wide absorption bandwidth

It can be used in ultra-short mode-locked lasers, laser radar, passive Q-switched lasers, and eye safety (1.5-1.6 μm) laser products.

  • High thermal conductivity
  • Wide absorption bandwidth near 976 nm
  • High absorption and emission cross-sections
  • A uniaxial crystal having a triangular structure
  • Extremely high energy transfer efficiency from Yb3+ to Er3+

Standard

Er, Yb:YAB crystal
Orientationc-cut
Clear Aperture>90%
Face Dimension Tolerance+0,0/-0,1 mm
Length Tolerance±0,1 mm
Parallelism Error<10 arcsec
Squareness Error<10 arcmin
Protective Chamfer<0,15 mm @ 45˚
Surface Finish10-5 S-D
Flatness<λ/10@632.8 nm
CoatingAr@(R<1%) @940 nm + AR(R<0,25%)@1480-1600 nm
Laser Damage Threshold>10 J/cm2@1550 nm, 10 ns

Spectral and Thermomechanical Properties

Absorption Peak Wavelength976 nm
Absorption Cross Section at Peak Wavelength2.7×10-20 cm2
Absorption Bandwidth at Peak Wavelength17 nm
Laser Wavelength1522, 1531, 1543, 1550, 1602 nm
Erbium Level 4I13/2 Lifetime0.32 ms
Emission Cross Section@1531 nm2.5×10-20 cm2
Yb to Er Energy Transfer Efficiency>90 %
Refractive Index@632.8 nmno=1.7757, ne=1.7015
Crystal StructureTripartite
Density3.84 g/cm3
Mohs Hardness7.5
Thermal Conductivity7.7 (//a), 6 (//c) Wm-1K-1
dn/dT1.4×10-6 (//a), 4.8×10-6 (//c) K-1
Thermal Expansion Coefficient2×10-6 (//a), 9.5×10-6 (//c) K-1
Typical Doping Standards1-2 at.% [Er]

8-15 at.% [Yb]

Spectrum

Er，Yb：YAB laser crystal absorb emission（π）Er，Yb：YAB laser crystal absorb emission(σ)
Er，Yb：YAB Absorption Emission Curve(π)Er，Yb：YAB Absorption Emission Curve(σ)
Er，Yb：YAB Laser Crystal Absorption Curve-1
Er，Yb：YAB Absorption Curve

References

[1]2.0W diode-pumped Er：Yb：YAl3(BO3)4 laser at 1.5–1.6μm
[2]Efficient 1W continuous-wave diode-pumped Er,Yb：YAl3(BO3)4 laser
[3]Er,Yb：YAl3(BO3)4—efficient 1.5 µm laser crystal
[4]Passively 𝑄-switched microchip Er, Yb：YAl3(BO3)4 diode-pumped laser

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