Applications of Yb YAG Laser Crystals
Advantages of Yb YAG Laser Crystals
Very low fractional heating, less than 11%
The 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 of Yb YAG Laser Crystals
Doping(atm%): | 1.0% ~ 20% |
Orientation: | <111>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.
Properties of Yb YAG Laser Crystals
Laser Transition | 2 F 5/2→2 F 7/2 |
Laser Wavelength | 1030nm |
Photon Energy | 1.93×10-19 J(@1030nm) |
Emission Linewidth | 9nm |
Emission Cross Section | 2.0×10-20 cm2 |
Fluorescence Lifetime | 1.2ms |
Diode Pump Band | 940nm or 970nm |
Pump Absorption Band Width | 8nm |
Index of Refraction | 1.82 |
Thermal Optical Coefficient | 9×10-6/℃ |
Loss Coefficient | 0.003 cm-1 |
