|
Nd:KGW
(Neodimium Doped
Potassium Gadolinium Tungstate,
Nd:KGd(WO4)2
)
Nd:KGW is a low-threshold, highly effective laser
material. At low pumping energies (0.5 to 1.0 J), KGW is one the few
materials ensuing an effective laser generation. The efficiency of a KGW
laser with low pump power may be 3 - 5 times better than that of a YAG laser. KGW
single crystals can also be used for the fabrication of high-efficiency
lasers with high output energy.
Basic Properties
|
Formula |
Nd:KGd(WO4)2
|
|
Structure Symmetry |
Monoclinic; 2/m; l2/a |
|
Lattice Constants |
a=8.10A, b=10.43A, c=7.60A,
β=94.4°
|
|
Melting Point |
1075
°C |
|
Phase Transition to Tetragonal Form |
1005
°C |
|
Hardness, Mohs |
4 |
|
Density |
7.27g/cm3
|
|
Thermal Conductivity |
2.8[100]; 2.2[010]; 3.5[001] W/m/K |
|
Transmission Range |
350 ~5500 nm |
|
Refractive Index (@1067nm) |
ng=2.033; nm=1.986;
np=1.937
|
|
Fluorescent Lifetime |
110 μs (3% doping), 90 μs ( 8% doping)
|
|
Thermal Expansion |
4.0[100]; 3.5[010]; 8.5[001] 10-6/K |
|
Optical Damage Threshold |
20 GW/cm2
|
|
Optical Homogeneity |
<1 x 10-5 dn/n
|
|
Peak Emission Cross Section |
>3.8 x 10-19/cm2
@1067nm |
|
Yong Modules |
115.8[100], 152.5[010], 92.4[001] |
|
Bend Limits |
13.9[100], 10.2[010], 6.4[001] kg/mm |
|
Solubility in Water |
Insoluble |
|
Lasing Wavelength |
911nm,1067nm,1351nm |
|
Peak Absorption Wavelength |
811nm |
|
Absorption Linewidth (FWHM) |
4.5nm |
|
Absorption
coefficient ( 3% Nd) |
20 cm-1
|
Standard Products
The standard product is cut along
[010], with an Nd concentration of 2-10 at %, a length of 50mm, and a diameter of
3, 4 or 5mm. AR, HR or PR coatings are available upon
request.
Please
contact Newlight Photonics
Inc. for your specific requirement of Nd:KGW.
Specifications on
finished products
| Diameter tolerance: +/-0.1mm |
| Length tolerance: +/-0.2mm |
| Scratch/Dig: 20/10 per MIL-O-1380A
|
| Parallelism: < 20 arc seconds |
| Perpendicularity: < 5 arc minutes |
| Surface flatness: ~< λ/6 at 632.8nm |
| Clear aperture: Central 95% |
| Chamfer: 0.2mm x 45deg |
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