Nd:YVO4and Nd:GdVO4are commonly applied in diode pumped solid state lasers. Comparing with Nd:YAG, they featured much higher absorption coefficient in a broader band centered at 808nm, and larger stimulated emission cross-section at lasing wavelengths, bring lower lasing threshold and higher slope efficiency. Their natural birefringence gives rise to a highly polarized output. Using CZ method, LNG Optics provide Nd:YVO4and Nd:GdVO4with different doping rates, and pure YVO4for birefringent applications. We also accept contract growth of special doping vanadate crystals according to customers’ requirements.
Features & Standard Specifications from LNG Optics:
Square Laser Rods, Slabs maximum length up to 40mm
Flat/Flat, Parallel/Antiparallel wedged, Brewster angle apertures.
Diffusion Bonded elements (composite Nd:YVO4+YVO4or Nd:YVO4+KTPmodules)
Coating: Single band, dual-band AR, HR or PR
“Cold” Laser Slab modules
Orientation: a-cut +/- 0.5°
Dimension Tolerance:±0.1mm
Length Tolerance: +0.2/-0.1mm
Surface Quality: 10/5 Scratch/Dig
Surface Flatness: λ/8 @ 633nm
Wavefront Distortion: λ/4 @ 633nm
Parallelism: 20 arc seconds
Perpendicularity: 5 arc minutes
Chamfer 0.1mm x 45°
Barrel: 50-80 micro-inch (RMS) or Prepolished
Main properties reference: |
Nd:YVO4 |
Nd:GdVO4 |
Dopant level (at%) |
0.1 – 3.0 |
0.1 - 3.0 |
Lasing/wavelength (nm)* |
4F3/2→4I11/2/ 1064 |
4F3/2→4I11/2/ 1062.9 |
Gain bandwidth (nm) |
0.96 |
3 |
Stimulated Emission Cross-Section (×10-19cm2) |
20 |
12.2 |
Spontaneous Fluorescent Lifetime (μs) for 1 at% |
100 |
95 |
Refractive Index @ 1064nm |
no=1.958, ne=2.168 |
no=1.972, ne=2.192 |
Pump peak wavelength (nm) |
808 |
808 |
Absorption bandwidth (nm) |
801-821 |
1.6 |
Absorption coefficient @ 1.0 at% doping (cm-1) |
31.4 |
65 |
Thermal conductivity (W/m/K) |
5.1 |
11.7 |
Density (gram/mm³) |
4.22 |
5.47 |
* Other transition wavelengths are available upon request.