Laser Crystals: Yb:YAG Crystal

It is more suitable for diode-pumping than the traditional Nd-doped systems. It can be pumped at 0.94 μm laser output. Compared with the commonly used Nd:YAG crystal, Yb:YAG crystal has a much larger absorption bandwidth to reduce thermal management requirements for diode lasers, a longer upper-state 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.

Advantages:

• 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

We offer Yb:YAG specifications

Doping(atm%):	1.0% ~ 35%
Orientation:	<111> or  <100>  crystalline direction
Wavefront Distortion:	λ/10 per inch @ 632.8 nm
Dimension Tolerances：	rods with diameter: +0.0/-0.05 mm , Length: ±0.1 mm
Surface Quality:	10/5 Scratch/Dig MIL-O-1380A
Parallelism:	< 10″
Perpendicularity:	< 5′
Clear Aperture:	> 90%
Surface Flatness:	< λ/10 @ 632.8 nm
Chamfer:	< 0.1 mm @ 45o
Barrel Finish:	50-80 micro-inch (RMS) ,
Size	Upon customer request
Coating	AR/HR/PR coating upon customer’s request
Damage Threshold	750MW/CM2 at 1064nm, TEM00, 10ns, 10Hz
Quality Warranty Period	One year under proper use

Slabs, thread rod, Er:YAG, Nd:YAG, Cr:YAG,Ce:YAG, Tm:YAG,Ho:YAG and other ion doped YAG crystals are also available upon request.

Yb:YAG crystals with diffusion bonded undoped YAG endcaps or Q-switch are also available from us.