Yb:YAG

Yb:YAG is one of the most promising laser-active material and more suitable for diode-pumping than the traditional Nd-doped systems. Compared with the commonly used Nd:YAG crystal, Yb:YAG crystal has a much larger absorption bandwidth to reduce thermal management requirement for diode lasers, a longer upper-laser level lifetime, three to four times lower thermal loading per unit pump power. Yb:YAG crystal is expected to replaced Nd:YAG crystal for high power diode-pumped lasers and other potential applications.

Advantage of Yb:YAG crystals

Very low fractional heating, less than 11%
Very high slope efficiency
Broad absorption bands, about 8nm@940nm
No excited-state absorption or up-conversion
Conveniently pumped by reliable InGaAs diodes at 940nm (or 970nm)
High thermal conductivity and large mechanical strength
High optical quality
 
Specifications:

Dopant concentrations Yb:0.2~50at%
Orentation [111] or [100] within 5º
Wavefront Distortion ≤125λ/inch
Extinction Ratio ≥28dB
Rod sizes Diameter 2~20mm, Length 2~200mm
Upon request of customer
Dimensional tolerances Diameter: +0.00/-0.01mm, Length: ±0.1mm
Barrel finish Ground finish with 400# grit or polished
Parallelism ≤10″
Perpendicularity ≤5′
Flatness λ/10@632.8nm
Surface Quality 10-5(MIL-O-13830A)
Chamfer 0.1~0.5mm 45º
AR coating reflectivity ≤0.2%@1064nm