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Ho:Cr:Tm:YAG is a high efficiency laser material which
lasers at 2.1μm. It has wide applications in medical military and
meteorology fields.
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Main
Specifications
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| Dopant concentration |
Ho:～0.35 at%,
Tm:～5.8 at%,Cr:~1.5at% |
| Orientation |
[111] within 5° |
| Wavefront Distortion |
≤ 0.125λ/inch(@1064nm) |
| Extinction Ratio |
≥25 dB |
| Rod Sizes |
Diameter:3～6mm,Length:50～120mm
Upon request of customer |
| Dimensional Tolerances |
Diameter:+0.00/-0.05mm,
Length: ± 0.5mm |
| Barrel Finish |
Ground Finish: 400# Grit |
| Parallelism |
≤30" |
| Perpendicularity |
≤5′ |
| Flatness |
λ/10 |
| Surface Quality |
10-5 |
| Chamfer |
0.006"±0.002" at
45°± 5° |
| AR Coating Reflectivity |
≤ 0.25% (@2094nm) |
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Physical
and Optical Properties
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| Crystal Structure |
Cubic |
| Lattice Parameters |
12.01 Å |
| Melting Point |
1970°C |
| Moh Hardness |
8.5 |
| Density |
4.56±0.04g/cm3 |
| Specific Heat (0-20) |
0.59J/g.cm3 |
| Modulus of Elasticity |
310GPa |
| Young's Modulus |
3.17×104Kg/mm2 |
| Poisson Ratio |
0.3(est.) |
| Tensile Strength |
0.13~0.26GPa |
| Thermal Expansion
Coefficient |
[100]Direction:8.2×10-6/°C(0~250°C) |
| [110]Direction:7.7×10-6/°C(0~250°C) |
| [111]Direction:7.8×10-6/°C(0~250°C) |
| Thermal Conductivity |
14W/m/K(@20°C) |
| 10.5W/m/K(@100°C) |
| Thermal Optical Coefficient (dn/dT) |
7.3×10-6/°C |
| Thermal Shock Resistance |
790W/m |
| Solubility |
Water: Insoluble;
Common Acids: Slightly |
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Optical and Spectral
Properties
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| Laser Transition |
5I7 - 5I8 |
| Laser Wavelength |
2.097 μm |
| Photon Energy |
9.55 x 10-20 J |
| Emission Cross Section |
7 x 10-21 cm2 |
| Fluorescence Lifetime |
8.5 ms |
Index of Refraction
Absorption Linewidth
Diode Pump Band
Major Pump Bands |
1.80 @2.08 μm |
| 4 nm |
| 781 nm |
| 400~800 nm |
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