PRODUCTS
MESSAGES
Nd:GdVO4 - Neodymium Doped Gadolinium Orthovanadate
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. Basic Properties
Crystal Structure |
Tetragonal, space group I41/amd |
Lattice Parameter |
a = 7.21 Å, c = 6.35 Å |
Lasing Transition |
4F3/2→4I11/2 |
Lasing Wavelength |
1062.9 nm |
Emission Cross Section (at 1064 nm) |
7.6 × 10-19 cm2 |
Absorption Cross Section (at 808 nm) |
4.9 × 10-19 cm2 |
Absorption Coefficient (at 808 nm) |
74 cm-1 |
Index of Refractivity ( at 1064 nm) |
no = 1.972, ne = 2.192 |
Thermal Conductivity (<110>) |
11.7 W/m/K |
Density |
5.47 g/cm3 |
Nd Dopant Concentration |
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 |
||
Crystal Structure, Space Group |
Tetragonal, I41/amd |
Tetragonal, I41/amd |
||
Lattice Parameter |
a = 7.21 Å, c = 6.35 Å |
a = 7.21 Å, c = 6.29 Å |
||
Melting Temperature (℃) |
1780 |
1825 |
||
Thermal Expansion @25 ℃, ×10-6/℃ |
a |
1.5 |
a |
4.43 |
c |
7.3 |
c |
11.4 |
|
Specific Heat @25 ℃, cal/mol·K |
32.6 |
24.6 |
||
dn/dT, × 10-6 /℃ |
4.7 |
2.7 |
Table 3. Information Regarding Neodymium Laser Host Crystals
Crystal |
Nd:YVO4 |
Nd:GdVO4 |
Nd:YAG |
Laser Wavelengths |
1064.3 nm, 1342.0 nm |
1062.9 nm, 1340 nm |
1064.2 nm, 1338.2 nm |
Emission Bandwidth (linewidth at 1064 nm) |
0.8 nm |
No data |
0.6 nm |
Effective Laser Cross Section (emission cross section at 1064 nm) |
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 |
Fluorescence Lifetime with 1% Nd Doping |
~ 100 µs |
~ 95 µs |
~ 230 µs |
Pump Wavelength |
808.5 nm |
808.4 nm |
807.5 nm |
Peak Pump Absorption at 1% Doping |
~ 41 cm-1 |
~ 57 cm-1 |
|
Thermal Conductivity |
5.1 W/m/K |
11.7 W/m/K |
14 W/m/K |
Doping Concentration Range |
0.1 - 3.0% |
0.1 - 3.0% |
0.3- 2.0% |
Specifications of Nd:GdVO4 crystal from CASTECH:
Table 4. Specifications
Dimension Tolerance |
(W ± 0.1 mm) × (H ± 0.1 mm) × (L +0.2/-0.1 mm) |
Clear Aperture |
Central 90% of the diameter |
Flatness |
≦λ/8 @633 nm (L≧2.5 mm) ≦λ/4 @633 nm (L<2.5 mm) |
Surface Quality (Scratch/Dig) |
10/5 to MIL-PRF-13830B |
Transmitted Wavefront Distortion |
≦λ/4 @633 nm |
Parallelism |
20 arc sec |
Perpendicularity |
≦15 arc min |
Angle Tolerance |
≦±0.5° |
Chamfer |
≦0.2 mm × 45° |
Chip |
≦0.1 mm |
AR Coating |
R<0.2% @1064 nm |
HR Coating |
R>99.8% @1064 nm, T>95% @808 nm |
Quality Warranty Period |
One year under proper use. |
Products
-
Nd:GdVO4 - Neodymium Doped Gadolinium Orthovanadate
- Nd:GdVO4 is an excellent laser crystal with similar properties to Nd:YVO4 in physical, optical and mechanical properties. It is an ideal laser host crystal for diode-pumped all-solid-state laser.
-
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. Basic Properties
Crystal Structure |
Tetragonal, space group I41/amd |
Lattice Parameter |
a = 7.21 Å, c = 6.35 Å |
Lasing Transition |
4F3/2→4I11/2 |
Lasing Wavelength |
1062.9 nm |
Emission Cross Section (at 1064 nm) |
7.6 × 10-19 cm2 |
Absorption Cross Section (at 808 nm) |
4.9 × 10-19 cm2 |
Absorption Coefficient (at 808 nm) |
74 cm-1 |
Index of Refractivity ( at 1064 nm) |
no = 1.972, ne = 2.192 |
Thermal Conductivity (<110>) |
11.7 W/m/K |
Density |
5.47 g/cm3 |
Nd Dopant Concentration |
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 |
||
Crystal Structure, Space Group |
Tetragonal, I41/amd |
Tetragonal, I41/amd |
||
Lattice Parameter |
a = 7.21 Å, c = 6.35 Å |
a = 7.21 Å, c = 6.29 Å |
||
Melting Temperature (℃) |
1780 |
1825 |
||
Thermal Expansion @25 ℃, ×10-6/℃ |
a |
1.5 |
a |
4.43 |
c |
7.3 |
c |
11.4 |
|
Specific Heat @25 ℃, cal/mol·K |
32.6 |
24.6 |
||
dn/dT, × 10-6 /℃ |
4.7 |
2.7 |
Table 3. Information Regarding Neodymium Laser Host Crystals
Crystal |
Nd:YVO4 |
Nd:GdVO4 |
Nd:YAG |
Laser Wavelengths |
1064.3 nm, 1342.0 nm |
1062.9 nm, 1340 nm |
1064.2 nm, 1338.2 nm |
Emission Bandwidth (linewidth at 1064 nm) |
0.8 nm |
No data |
0.6 nm |
Effective Laser Cross Section (emission cross section at 1064 nm) |
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 |
Fluorescence Lifetime with 1% Nd Doping |
~ 100 µs |
~ 95 µs |
~ 230 µs |
Pump Wavelength |
808.5 nm |
808.4 nm |
807.5 nm |
Peak Pump Absorption at 1% Doping |
~ 41 cm-1 |
~ 57 cm-1 |
|
Thermal Conductivity |
5.1 W/m/K |
11.7 W/m/K |
14 W/m/K |
Doping Concentration Range |
0.1 - 3.0% |
0.1 - 3.0% |
0.3- 2.0% |
Specifications of Nd:GdVO4 crystal from CASTECH:
Table 4. Specifications
Dimension Tolerance |
(W ± 0.1 mm) × (H ± 0.1 mm) × (L +0.2/-0.1 mm) |
Clear Aperture |
Central 90% of the diameter |
Flatness |
≦λ/8 @633 nm (L≧2.5 mm) ≦λ/4 @633 nm (L<2.5 mm) |
Surface Quality (Scratch/Dig) |
10/5 to MIL-PRF-13830B |
Transmitted Wavefront Distortion |
≦λ/4 @633 nm |
Parallelism |
20 arc sec |
Perpendicularity |
≦15 arc min |
Angle Tolerance |
≦±0.5° |
Chamfer |
≦0.2 mm × 45° |
Chip |
≦0.1 mm |
AR Coating |
R<0.2% @1064 nm |
HR Coating |
R>99.8% @1064 nm, T>95% @808 nm |
Quality Warranty Period |
One year under proper use. |