Yb:YAG Yb:YAG is one of the most promising laser-active materials and more suitable for diode-pumping than the traditional Nd-doped systems. Compared with the company used Nd:YAG crystal, Yb:YAG crystal has a much larger absorption bandwidth to reduce thermal management requirements for diode lasers, a longer upper-laser level lifetime, three to four times lower thermal loading per unit pump power. ADVANTAGES ● Very low fractional heating, less than 11% ● Very high slope deficiency ● Broad absorption bands, about 8nm@940nm ● No excited-state absorption or up-conversion ● Conveniently pumped by reliable in GaAs diodes ● High thermal conductivity@ 940nm (or 970nm) ● High optical quality ● Flat/flat ● Parallel/ anti-parallel wedged ● Brewster angle ● Concave/convex radii ● Cylinder grooved
Specifications
Material | Yb:YAG |
Yb-dopant concentration | 0.5%--25at% |
Orientation | or |
Dimensions | Diameter:2mm-50mm, Length:5-180mm(Upon customer’s request) |
Clear aperture | Central 95% |
Extinction Ratio | >30dB (depends on actual size) |
Diameter Tolerance | +0/-0.02mm |
Length tolerance | +0.5/-0mm |
Flatness | <λ/10@632.8nm |
Damage Threshold | >700MW/cm2 @10ns 10HZ |
Barrel Finish | Ground Finish 400#Grit |
Scratch/Dig | 10-5@MIL-0-13830A |
Parallelism | <10 arc seconds |
Perpendicularity | <5 arc minutes |
Wavefront Distortion | λ/8 per inch @632.8nm |
Anti-Reflection coating | R<0.2%@1030nm per surface |
Properties
Laser transition | 2F5/2 →2F7/2 |
Laser Wavelength | 1030nm |
Photon Energy | 1.93*10ˉ19 J@1030nm |
Emission Linewidth | 9nm |
Fluorescence Lifetime | 1.2ms |
Diode pump Band | 940nm or 970nm |
Pump Absorption Band Width | 8nm |
Index of Refraction | 1.82@1030nm |
Loss Coefficient | 0.003 cm-1 |
