Ho ion is used as active ion, the pump wavelength is 1.9 μm, and the output wavelength is 2.05 μm unpolarized laser. Due to the excellent physical and chemical properties of the YAG matrix, it can withstand high thermal loads, so it can output 2.05....
Product Description
Ho ion is used as active ion, the pump wavelength is 1.9 μm, and the output wavelength is 2.05 μm unpolarized laser. Due to the excellent physical and chemical properties of the YAG matrix, it can withstand high thermal loads, so it can output 2.05 μm lasers with high power and high repetition frequency. It is an important pump source laser crystal for mid-wave infrared lasers
Main Features
Unpolarized laser output
high thermal conductivity
Strong thermal shock resistance
Suitable for 1.9μm laser pumping
Material Properties
Crystal structure | Cubic system |
Lattice constant | 12.01 Å |
Melting point | 1970°C |
Moh's hardness | 8.5 |
Density | 4.56±0.04g/ cm3 |
Specific heat | 0.59J/g.cm 3 @0-20℃ |
Elastic Modulus | 310GPa |
Young's modulus | 3.17×10 4 Kg/mm2 |
Poisson's ratio | 0.3 |
Tensile strength | 0.13~0.26GPa |
Coefficient of thermal expansion | [100] Direction: 8.2×10 -6 /K@ 0~250℃ |
[110] Direction: 7.7×10 -6 /K@0~250℃ | |
[111] Direction: 7.8×10 -6 /K@0~250℃ | |
Thermal conductivity | 14W/m/K@20℃ |
10.5W/m/K@100℃ | |
Thermo-optic coefficient (dn/dT) | dn/dT =7.3×10 -6 /K |
Thermal shock resistance | 790W/m |
Solubility | Insoluble in water, slightly soluble in common acids |
Product Parameters
Doping concentration | 0~3at% Can be customized according to customer requirements |
Orientation | <111>±5° |
Wavefront distortion | ≤0.25λ/25mm @632.8nm |
Size | Diameter: 3~15mm, Length: 5~180mm , can be customized |
Dimensional tolerance | Diameter: +0.00/-0.05mm, Length: ± 0.5mm |
Cylindrical processing | Grinding or Polishing |
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 |
AR Coating Reflectance | ≤0.25% |