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 commonly used Nd:YAG crsytal , Yb:YAG crystal has 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. Yb:YAG crystal is expected to replace Nd:YAG crystal for high power diode-pumped lasers and other potential applications.

Very low fractional heating, less than11%
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
High optical quality

The Sellmeier equations (l in µm):
n ^2 = 2.08745 + 1.2081 l ^2 /(l^ 2 - 0.02119 )+ 17.2049 l ^2 /(l ^2 - 1404.45 )

Crystal Properties
Please view Laser crysal Properities

Specifications:

Orientation:	<111> or <100]> crystalline within 5°
Wavefront distortion :	l /8 per inch @ 633 nm
Extinction Ratio:	>25dB
Dimension Tolerances	Rods with diameter: ±0.025 mm , Length: ±0.5 mm
Surface quality:	10/5 Scratch / Digper MIL-O-1380A
Parallelism:	< 10 arc seconds
Perpendicularity:	< 5 arc minutes
Flatness:	< l /10 @ 633 nm
chamfer:	<0.1 mm @ 45deg.
Barrel Finish:	50-80 micro-inch (RMS) ,
AR Coating Reflectivity	< 0.25%