Neodymium doped Yttrium Vanadate
Nd:YVO4
Neodymium doped Yttrium Vanadate (Nd:YVO4 or Nd3+:YVO4) is one of the most effective and advanced materials for diode pumped lasers. Compactly designed Nd:YVO4lasers with green, red and blue light output are really perfect means for material processing, spectroscopy, medical diagnostics, laser printing and other applications. Compared to Nd:YAG and Nd:YLF, Nd:YVO4 diode pumped lasers have: wide absorption bandwidth, low lasing threshold, high slope efficiency, large luminescent cross-section, linearly polarized emission and single-mode output. Yttrium Vanadate doped with Erbium or Ytterbium work on wavelengths of 1.54µm and 1.61µm and are used in eye safe laser applications.
In contrast to Er3+ or Yb3+ doped phosphate glass, Er3+,Yb3+:YVO4 crystals can be used in CW mode with high pump energy and high efficiency. Its thermal conductivity is much higher than that of glass and this improves pump characteristics of the laser and relaxes cooling requirements. Yb3+:YVO4 has a wide absorption bandwidth at 0.98µm and can generate with high effectivity at 1.02µm due to low losses of the pump energy. New Nd3+-doped gadolinium vanadate crystals (Nd3+ dotierte Gadolinium-Vanadat-Kristalle (Nd3+:GdVO4) allow to create effective diode-pumped lasers for applications in medicine and technique.
Optical and spectral properties | |
|---|---|
Lasing wavelength in nm | 1064 nm 1342 nm
|
Refractive index @ 1064 nm | no = 1,9573 ne = 2,1652
|
dN/dT in 1/K | no = 8,5 ·10-6 ne = 2,9·10-6 |
Physical properties | |
|---|---|
Density in g/cm3 | 4,22 |
Melting point in °C | 1825 |
Crystal structure | tetragonal |
Thermal conductivity in W/(m · K) | 25
|
Thermal expansion in 1/K | 4,43 ·10-6 (a-axis) 11,4 ·10-6 (c-axis) |
Mohs hardness | 4-5 |
Lattice constant in Å | a = b = 7,12 c = 6,29 |
Fluorescence lifetime in µs | 90 |
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