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CRYLINK’s erbium, ytterbium co-doped aluminum borate yttrium crystal products, also known as Er,Yb:YAB crystals. It is a kind of laser glass product with excellent comprehensive performance. It is widely used in telecommunication system, radar monitoring and laser field. The product is characterized by high thermal conductivity, high absorption and emission cross-sections, and wide absorption bandwidth. It can be used in ultra-short mode-locked lasers, laser radar, passive Q-switched lasers, eye safety (1.5-1.6 μm) laser products.

Product Parameters

Absorption peak wavelength

976 nm

Absorption cross-section at peak wavelength

2.7×10-20 cm2

Absorption Bandwidth at peak wavelength

17 nm

Laser wavelength

1522, 1531, 1543, 1550, 1602 nm

Lifetime of 4I13/2 erbium energy level

0.32 ms

Emission cross-section@1531 nm

2.5×10-20 cm2

Yb to Er energy transfer efficiency

>90 %

Refractive index@632.8 nm

no=1.7757, ne=1.7015

Crystal structure



3.84 g/cm3

Mohs hardness


Thermal conductivity

7.7 (//a), 6 (//c) Wm-1K-1


1.4×10-6 (//a), 4.8×10-6 (//c) K-1

Thermal expansion coefficient

2×10-6 (//a), 9.5×10-6 (//c) K-1

Typical doping level

1-2 at.% [Er]

8-15 at.% [Yb]

Er, Yb:YAB Crystal



Clear aperture


Face dimensions tolerance

+0,0/-0,1 mm

Length tolerance

±0,1 mm

Parallelism error

<10 arcsec

Perpendicularity error

<10 arcmin

Protective chamfers

<0,15 mm at 45˚

Surface quality

10-5 S-D

Surface flatness

<λ/10@632,8 nm


AR@(R<1%) @940 nm +

AR(R<0,25%) @1480-1600 nm

Laser-induced damage threshold

>10 J/cm2@1550 nm, 10 ns

Er,Yb:YAB Absorption Emission Curve(π)Er,Yb:YAB Absorption Emission Curve(σ)
Er,Yb:YAB Absorption Curve 

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