Holmium doped Yttrium Lithium Flouride
Material
Ho:YLF
Single crystalline Holmium doped Yttrium-Lithium fluoride rods (Ho:YLF or Jo3+:LiYF4) are used in solid-state lasers which are widely used for industrial, medical and scientific applications. Pure YLF crystals are transparent within the spectrum band of 0.12µm-7.5µm. They are also photo, thermo and radiation resistant. The YLF crystals have low values of non-linear refraction index and thermo optical constants, which makes theses crystals applicable in areas as research, development, production, photonics, optic, laser technology and telecommunications.
Typical applications for Er:YLF, Ho:YLF and Tm:YLF products:
- Highly sensitive detection/ranging measurement systems (Ho:YLF, wavelength - 0.75µm and Er:YLF, wavelength - 0.85µm)
- Eye-harmless target spotlighting laser system (Er:YLF, wavelength - 1.73µm)
- Complex measurement systems using several operation wavelengths:
- Er:YLF, wavelength 0.85µm and 1.73µm
- Ho:YLF, wavelength 0.75µm and 0.98µm
- Tm:YLF, wavelength 2.35µm and 1.89µm
- Guidance systems laser (Ho:YLF, wavelength 3.9µm)
Properties
Optical and spectral properties | |
|---|---|
Lasing wavelength in nm | 2060 nm |
Refractive index @ 1064 nm | no= 1,448 ne= 1,470 |
dN/dT in 1/K | -4,6 · 10-6 (∥ c-axis) -6,6 · 10-6(∥ a-axis) |
Physical properties | |
|---|---|
Density in g/cm3 | 3,95
|
Crystal structure | tetragonal |
Thermal conductivity in W/(m · K) | 6
|
Thermal expansion in 1/K | 10,1 · 10-6 ( ∥ c-Achse) 14,3 · 10-6 (∥ a-axis) |
Mohs hardness | 5 |
Typical dopant concentration in % | 0,5 ‐ 1 |
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