Ho:YAG crystal, also known as Holmium-doped yttrium aluminum garnet is a reliable material for direct Ho³⁺ excitation, operating in the 2.1 µm spectral range. It’s used in various applications, including atmospheric remote sensing and high harmonic generation. The low quantum defect of Ho:YAG, combined with the excellent thermo-mechanical properties of YAG, results in a small heat load and potential for scaling to high output power.
Ho:YAG crystals available from stock
Description
Holmium-doped yttrium aluminum garnet (Ho:YAG) is a laser crystal that operates in the 2.1 µm spectral range, making it ideal for various scientific, medical, and atmospheric applications. The low quantum defect of Ho:YAG, combined with the excellent thermo-mechanical properties of YAG, results in a small heat load, offering potential for scaling to high output power.
The radiation wavelength of Ho³⁺ ions in Ho:YAG is near 2100 nm, which is located in the human eye safe band and has high transmittance in the atmosphere. This makes it useful in remote sensing detection, laser ranging, laser radar, and medical surgery. Its penetration depth in the human body is only a few tens of micrometers, and it has little heat damage to the surrounding tissues of the human body. Therefore, it is widely used in medical surgery and treatment.
Specifications
Physical and Thermal Properties
| Chemical formula | Ho:Y3Al5O12 (Ho-doped yttrium aluminum garnet) |
| Possible dopant concentrations | 0.2 – 3 at. % |
| Crystal structure | cubic |
| Lattice constants | a = 12.01 Å |
| Density | 4.56 g/cm3 |
| Mohs hardness | 8.5 |
| Melting point | 1970 °C |
| Refractive index (at 1064 nm) | n = 1.8147 |
| Thermal conductivity | K = 11.2 W/(mxK) |
| Specific heat | C = 0.59 J/(gxK) |
| Termal expansion coefficients | α[111] = 7.8 x 10-6 °C-1 |
| dn/dT | 7.3 × 10-6 °C-1 |
Spectroscopic Properties
| Absorption peak wavelength | 1907 nm |
| Absorption cross-section at peak wavelength | 1.09 × 10-20 cm2 |
| Absorption bandwidth (FWHM) | 8 nm |
| Emission peak wavelength | 2090 nm |
| Emission cross-section at peak wavelength | 1.14 × 10-20 cm2 |
| Fluorescence lifetime | 7 ms |
Standard Manufacturing Specifications
| Cut orientation error: | +/- 30 arcmin |
| Dimensions tolerance: | +/- 0.1 mm |
| Clear aperture: | > 85% |
| Surface quality: | 10-5 S-D |
| Surface flatness: | < λ/10 @ 633 nm |
| Parallelism error: | < 20 arcsec |
| Perpendicularity error: | +/- 5 arcmin |
Standard Products
Product | Doping | Orientation | Dimensions | Length | Wedge | Coatings | Price | Delivery | Quantity | |
|---|---|---|---|---|---|---|---|---|---|---|
Ho-YAG-0.5-D4x50-AR | 0.5 at.% | [111] | Ø 4 mm | 50 mm | < 20 arcsec | AR/AR 1900-2100 nm | 1176.00$ | 5-6 weeks | ||
Ho-YAG-0.7-D5x120-AR | 0.7 at.% | [111] | Ø 5 mm | 120 mm | < 20 arcsec | AR/AR 1907+2090 nm | 2088.00$ | 6-8 weeks | ||
Ho-YAG-0.8-D4x50-AR | 0.8 at.% | [111] | Ø 4 mm | 50 mm | < 20 arcsec | AR/AR 1900-2100 nm | 1176.00$ | 5-6 weeks | ||
Ho-YAG-1-3x3x50-AR | 1 at.% | [111] | 3 x 3 mm | 50 mm | 4° | AR/AR 1900-2100 nm | 1164.00$ | 2 weeks |
Haven’t found what you need?
