SPECIFICATIONS

Concentration

~50at%

Orientation

<111> or <100>±5°

Dimension

Diameter:2~6mm,  Length:30~150mm(Customized available)

Dimension Tolerance

Φ:+0/-0.04mm,L:+0.5/-0mm

Perpendicularity

≤5′

Parallelism

≤10″

Chamfer

0.15±0.05mm

Surface Quality

10/5(MIL-PRF-13830B)

Barrel

Fine Ground, Polishing, Grooving

Flatness

≤λ/10@632.8nm

Wavefront Distortion

≤λ/8 per inch @1064nm

Extinction Ratio

≥25dB

Damage Threshold

>500MW/cm²

Coating

R≤0.20%@2940nm

OPTICAL  PROPERTIES

Laser Transition

⁴I_3/2→⁴I_11/2

Wavelength

2940nm

Photon Energy

6.75×10^-20J@2940nm

Emission Cross Section

3×10^-20cm2

Main Pump Wavelength Range

600~800nm

PHYSICAL  AND CHEMICAL PROPERTIES

Crystal Structure

Tetragonal

Melting Point

1970°C

Density

4.56±0.04g/cm³

Specific Heat

0.59J/gNaN³

Elastic Modulus

310GPa

Young's Modulus

3.17×10⁴Kg/mm²

Mohs Hardness

8.5

Poisson’s Ratio

0.3

Tensile Strength

0.13~0.26GPa

Thermal Expansion Coefficients

<100>Direction:8.2×10^-6/K@0~250°C

<110>Direction:7.7×10^-6/K@0~250°C

<111>Direction:7.8×10^-6/K@0~250°C

Thermal Conductivity

14W/m/K@20°C

10.5W/m/K@100°C

Thermal Optical Coefficient

dn/dT=7.3×10^-6/k