Yb:KYW Crystal | Ytterbium-Doped Potassium Yttrium Tungstate Crystal

Absorption Peak Wavelength

980 nm

Peak Absorption Cross-Section

14×10⁻²⁰ cm² (E || Nm)

Peak Absorption Bandwidth

~3 nm

Laser Wavelength

1020 (1020-1050) nm

Lifetime of ^2F5/2 Energy Level

230 μs

Emission Cross-Section @ 1040 nm

2.5×10⁻²⁰ cm² (E || Nm)

Refractive Index @ 632.8 nm

ng= 2.037, np= 1.986, nm= 2.033

Crystal Structure

Monoclinic

Density

6.61 g/cm³

Mohs Hardness

4-5

Thermal Conductivity

~3.3 Wm⁻¹ K⁻¹

dn/dT

dnp/dT = -13.08 × 10⁻⁶ K⁻¹

dnm/dT = -7.61 × 10⁻⁶ K⁻¹

dng/dT = -11.83 × 10⁻⁶ K⁻¹

Thermal Expansion Coefficient

αp = 1.9×10⁻⁶ K⁻¹

αm = 10.3×10⁻⁶ K⁻¹

αg = 16.5×10⁻⁶ K⁻¹

Typical Doping Level

1~100 at.%

Face Dimensions (mm)

Length (mm)

End Face

Crystal Orientation

Doping

Coating

3x3

5

Right-angle cut

Ng-cut

2%

AR/AR @ 970-1070 nm

5x5

5

Right-angle cut

Ng-cut

2%

AR/AR @ 970-1070 nm

3x3, 5x5

5

Brewster-angle cut

Ng-cut

2%

Uncoated

3x3

2

Brewster-angle cut

Ng-cut

5%

AR/AR @ 970-1070 nm

5x5

2

Right-angle cut

Ng-cut

5%

AR/AR @ 970-1070 nm

3x3, 5x5

2

Brewster-angle cut

Ng-cut

5%

Uncoated

3x3

1

Right-angle cut

Ng-cut

10%

AR/AR @ 970-1070 nm

5x5

1

Right-angle cut

Ng-cut

10%

AR/AR @ 970-1070 nm

3x3, 5x5

1

Brewster-angle cut

Ng-cut

10%

Uncoated