Er,Yb:YAB

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 ⁴I_13/2 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

n_o=1.7757, n_e=1.7015

Crystal structure

Trigonal

Density

3.84 g/cm³

Mohs hardness

7.5

Thermal conductivity

7.7 (//a), 6 (//c) Wm^-1K^-1

dn/dT

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

Orientation

c-cut

Clear aperture

>90%

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

Coatings

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

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

Laser-induced damage threshold

>10 J/cm²@1550 nm, 10 ns