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Yb:YAG is an important diode-pumped laser crystal, which is more suitable for diode pumping than traditional Nd-doped laser materials.
Product Description
Compared with the commonly used Nd:YAG crystal, Yb:YAG crystal has a wider diode pump absorption bandwidth, which can effectively reduce the thermal management requirements of laser diodes. At the same time, the Yb ion laser has a long upper-level fluorescence lifetime, no excited state absorption and energy up-conversion, no radiation heat loss, and the heat load generated per unit pump power is 3 to 4 times lower than that of Nd:YAG crystals. Excellent crystal for average power solid-state lasers.
Main Features
High slope efficiency
High optical quality , thermal conductivity and mechanical strength
No excited state absorption and upconversion
The heat load generated by unit pump power is lower than that of Nd:YAG crystal
Diode pump absorption bandwidth is about 8nm@940nm
Suitable for common high power InGaAs laser diode (wavelength 940nm or 970nm) pumping
Material Properties
| Crystal structure | Cubic system |
| Lattice constant | 12.01 Å |
| Melting point | 1970°C |
| Moh's hardness | 8.5 |
| Density | 4.56±0.04 g/ cm3 |
| Specific heat | 0.59J/ g.cm3 @0-20℃ |
| Elastic Modulus | 310GPa |
| Young's modulus | 3.17×10 4 Kg/ mm2 |
| Poisson's ratio | 0.3 |
| Tensile strength | 0.13~0.26 GPa |
| Coefficient of thermal expansion | [100] Direction: 8.2×10 -6 /K @ 0~250℃ |
Product Parameters
| Doping concentration | 0.5～25at% |
| Orientation | <111>±5° |
| Wavefront distortion | ≤0.125λ/inch@632.8nm _ _ |
| Extinction Ratio | ≥25dB |
| Product Size | Diameter ≤ 30mm, length ≤ 220 mm, slats and discs can be customized |
| Dimensional tolerance | Diameter: 0/-0.05mm, Length: 0/+0.5mm |
| Cylindrical processing | Grinding, polishing, threading |
| Parallelism of end faces | ≤10" |
| Perpendicularity between end face and rod axis | ≤5′ |
| Flatness of end face | λ/10 @632.8nm |
| Surface Quality | 10-5 (MIL-O-13830A) |
| Chamfer | 0.15±0.05mm |
| Coating | S1/S2: R@1030nm≤0.2%&R@940nm≤2.0% |
| Damage threshold | ≥1GW/ cm2 @1064nm, 10ns, 10Hz |
| Diode pump absorption wavelength | 940nm or 970nm |
| Special | Wedge angle, concave/convex, hot layer gold plating |
