Nd:KGW Crystal | Neodymium-Doped Potassium Gadolinium Tungstate Crystal

Peak Absorption Wavelength

811 nm

Peak Absorption Cross-section

28×10^-20 cm²

Peak Absorption Bandwidth

11 nm

Laser Wavelength

1067 nm

4F3/2 Nd Energy Level Lifetime

130 μs

Emission Cross-section @1067 nm

21×10^-20 cm²

Refractive Index @1067 nm

ng=2.033, np=1.937, nm=1.986

Crystal Structure

Monoclinic

Density

7.25 g/cm³

Thermal Conductivity

~3 Wm-1K-1

Thermo-optic Coefficient (dn/dT)

dnp/dt=-15.7×10^-6 K^-1

dnm/dt=-11.8×10^-6 K^-1

dng/dt=-17.3×10^-6 K^-1

Thermal Expansion Coefficient

αp=1.60×10^-6 K^-1, αm=4×10^-6 K^-1, αg=8.5×10^-6 K^-1

Typical Doping Level

2-10 at.%

Space Group

C2h (2/c)-C2/c

Cell Parameters

a=8.087 Å, b=10.374 Å, c=7.588 Å, β=94.41°

Mohs Hardness

4-5 Mohs

Melting Point

1075 ℃

Thermal Conductivity (373 K)

K[100]=2.6 W/m/K

K[010]=3.8 W/m/K

K[001]=3.4 W/m/K

Young's Modulus

E[100]=115.8 GPa, E[010]=152.5 GPa, E[001]=92.4 GPa

Material

3%Nd:KGW

Emission Wavelength

1070 nm

Emission Bandwidth

15 nm

Stimulated Emission Cross-section (σe)

1.48×10^-20 cm²

Fluorescence Lifetime

109 µs

Gain Bandwidth

15 nm

Absorption Wavelength

810 nm

Absorption Bandwidth

14 nm

Absorption Cross-section (σe)

1.28×10^-20 cm²

Orientation

[010]

Standard Doping Concentration

Nd: 3, 5, 8 at.%

Maximum Length

50 mm

Size Tolerance

Diameter Tolerance: ±0.1 mm

Length Tolerance: ±0.5 mm

Surface Quality

20/10 (per MIL-PRF-13830B standard)

Flatness

λ/6 @ 633 nm

Parallelism

20"

Perpendicularity

≤15′

Coating

Anti-reflective (AR) coating

Size/mm

Length/mm

End Face

Doping

Coating

3x3

3

Right-angle cut

5%

AR/Ar@808nm+1067 nm

3x3

5

Right-angle cut

5%

AR/Ar@808nm+1067 nm

3x3

5

Right-angle cut

3%

AR/Ar@808nm+1067 nm

⌀3

5

Brewster-angle cut

5%

No coating

⌀3

60

Right-angle cut

3%

AR/Ar@1067 nm