Crystals Materials
Ho:YAG Crystals application for laser remote sensing, medical surgery, and pumping Mid-IR OPO's.
Ho:YAG crystal is excited by a 1.9 μm laser to generate unpolarized laser light with a wavelength of 2.09 μm. For applications such as laser remote sensing, medical surgery, and pumping Mid-IR OPO’s.
| Diameter | 3 ~ 20 mm |
| Length | 5 ~ 180 mm |
| Orientation | [111] < ± 0.5° |
| Thickness/Diameter Tolerance | ±0.05 mm |
| Surface Quality | 10/5 S/D |
| Parallelism | < 10″ |
| Perpendicularity | < 5' |
| Clear Aperture | > 90% |
| Wavefront Distortion | λ/8 @ 632.8 nm |
| Surface Flatness | < λ/10 @ 632.8 nm |
| Chamfer | < 0.1 mm @ 45° |
| Coating | upon customer's request |
| Chemical Formula | Ho3+:Y3Al5O12 |
| Crystal Structure | Cubic |
| Lattice Constant | 12.01 Å |
| Density | 4.56 g/cm3 |
| Melting Point | 1970°C |
| Thermal Conductivity | 14 W/m/K @ 20°C 10.5 W/m/K @ 100°C |
| Thermal Optical Coefficient (dn/dT) | 7.3 x 10-6/K |
| Thermal Shock Resistance | 790 W/m |
| Thermal Expansion | 7.8 x 10-6/K @ 25°C |
| Hardness (Mohs) | 8.5 |
| Young's Modulus | 317 GPa |
| Shear Modulus | 310 GPa |
| Extinction Ratio | 28 dB |
| Poisson Ratio | 0.3 |
| Laser Transition | 5I7→5I8 |
| Laser Wavelength | 2.05 μm |
| Absorption Cross Section | 1.09 x 10-20 cm2 |
| Emission Cross Section | 1.14 x 10-20 cm2 |
| Pump Wavelength | 1908 nm |
| Laser Wavelength | 2090 nm |
| Fluorescence Lifetime | 7 ms |
| Quantum Efficiency | 1 |
| Refractive Index @1.030 μm | 1.82 |
| Upper Conversion Loss Factor | 1.8, 2.6, 5.3 x 10-18 cm3/s |
Stock specification list
If need other specifications and quantities products, please contact us(sales@aogcrystal.com).
Anti-reflection coatings are available at your specified wavelength.
Be sure to wear laser safety goggles when checking optical path and adjusting optical axis.
To inquiry or order a finished Ho:YAG laser rod, please specify the specification listed above, for common application, we only need to know the main specification: Ho-dopant concentration, sizes, and coating. For special request,
please specify specification in details for evaluation and fabrication.
| Part Number | Face size | Length | Doping, atm.% | Coating |
|---|---|---|---|---|
| Ho-YAG-001 | Φ5.0 mm | 2.5 mm | 1.0 | AR/AR@1980 nm + 2090 nm |
| Ho-YAG-0801 | Φ5.0 mm | 6.0 mm | 1.0 | AR/AR@1980 nm + 2090 nm |
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