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Ho:Cr:Tm:YAG
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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.
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 � |
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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