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Nd:GdVO4
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CASTECH's Nd:GdVO4 is featured by:
• Large stimulated emission cross section at laser wavelength;
• High absorption coefficient and wide bandwidth at pump wavelength;
• Low dependency on pump wavelength;
• Good thermal conductivity;
• Low lasing threshold and high slope efficiency;
• High laser induced damage threshold;
• Strongly-polarized laser output.
Table 1. Specifications of Nd:GdVO4
Crystal Structure |
Tetragonal |
Space Group |
I41/amd |
Lattice Parameter |
a=0.721nm,b=0.635nm |
Lasing Transition |
4F3/2 ----> 4I11/2 |
Lasing Wavelength |
1062.9nm |
Emission Cross Section(at 1064nm) |
7.6×10-19 cm2 |
Absorption Cross Section(at 808nm) |
4.9×10-19 cm2 |
Absorption Coefficient(at 808nm) |
74 cm-1 |
Index of Refractivity(at 1064nm) |
no=1.972,ne=2.192 |
Thermal Conductivity(<110>) |
11.7 W/(m×K) |
Density |
5.47 g/cm3 |
Nd Dopant level (atomic) |
0.1%,0.2%,0.3%,0.5%,0.7%,1.0%,... |
Table 2. Material Properties: Comparing Nd:GdVO4 and Nd:YVO4
Crystal |
Nd:GdVO4 |
Nd:YVO4 |
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Crystal Structure,Space Group |
Tetragonal, I41/amd |
Tetragonal, I41/amd |
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Lattice constants(nm) |
a:0.721 b:0.635 |
a:0.721 b:0.629 |
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Melting temperature(℃) |
1780 |
1825 |
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Thermal expansion @25℃,×10-6/℃ |
a |
1.5 |
a |
4.43 |
b |
7.3 |
b |
11.4 |
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Specific heat @25℃,cal/mol·K |
32.6 |
24.6 |
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dn/dT,×10-6/℃ |
4.7 |
2.7 |
Table 3. Information Regarding Neodymium Laser Host Crystals
Crystal |
Nd:YVO4 |
Nd:GdVO4 |
Nd:YAG |
Laser Wavelength |
1064.3nm,1342.0nm |
1062.9nm,1340nm |
1064.2nm,1338.2nm |
Emission bandwidth |
0.8nm |
No data |
0.45nm |
Effective laser cross section |
15.6×10-19 cm2 |
7.6×10-19 cm2 |
6.5×10-19 cm2 |
Polarization |
Parallel to c-axis |
Parallel to c-axis |
unpolarized |
Radioactive lifetime (microseconds) |
~100μs |
~95μs |
230μs |
Pump wavelength |
808.5nm |
808.4nm |
807.5nm |
Peak pump absorption at 1% doping |
~41 cm-1 |
~57 cm-1 |
/ |
Thermal conductivity, W/m/K |
5.1 |
11.7 |
14 |
Doping concentration range |
0.1-3.0% |
0.1-3.0% |
0.1-2.0% |
CASTECH Warranty on Nd:GdVO4 Specifications:
• Wavefront Distortion:<λ/4 @ 633nm;
• Dimension Tolerance:(W±0.1mm)x(H±0.1mm)x(L+0.2/-0.1mm);
• Clear aperture: >90%;
• Flatness: λ/8 @ 633 nm, λ/4 @ 633nm for thickness less than 2mm;
• Scratch/Dig code: 10/5 to MIL-PRF-13830B;
• Parallelism: <20″;
• Perpendicularity: <5′;
• Angle Tolerance:<±30′ .
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