SINGLE CRYSTALS OF POTASSIUM-GADOLINIUM TUNGSTATE ACTIVATED BY NEODYMIUM α-KGd(WO4)2—Nd3+(KGW:Nd)
Description
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| Single crystals of potassium-gadolinium tungstate |
Single crystals of potassium-gadolinium tungstate (KGW:Nd) activated with neodymium ions,
Performance attributes
| Symmetry class | 2/m |
| Unit cell parameters [Å] | a = 8.095, b = 10.43, c = 7.588 |
| Optical orientation of crystal | np = b, ngc = 20° |
| Angle between optical axes [degree of arc] | 86.5° |
| Mohs hardness | 5 |
| Density [g/cm–3] | 7.27 |
| Phase transition point [oC] | 1005 |
| Transparency range [mm] | 0.35—5.5 |
| Refractive index (λ = 1.067mm) | ng = 2.033 np = 1.937 nm = 1.986 |
| Heat conductivity [Wxm–1 K–1] | 2.8[100] 2.2[010] 3.5[001] |
| Thermal expansion coefficient [K–1] | 4·10–6[100] 3.6·10–6[010] 8.5·10–6[100] |
Generation properties: |
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| Laser transition | 4F3/2 → 4I11/2 |
| Generation wavelength [mm] | 1.0672 |
| Lifetime of metastable level [ms] | 110 |
| Width of luminescence line [cm–1] | 24 |
| Cross section of laser transition [cm2] | 4.3·10–19 |
| Laser generation threshold [J] | 0,2—1 |
Laser radiation power [W] |
|
| Active element: diameter 4mm, length 65mm, 300Hz |
50 |
| diameter 6.3mm, length 75mm, 50Hz | 60 |
| Efficiency of laser radiation, %: Active element: diameter 4mm, length 65mm, 12.5—300Hz |
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| λ = 1,06mm | 4—7.3 |
| λ = 0,55mm | 2.0 |
Technical and economical advantages:
The single crystals are distinguished by high optical quality and posses high beam durability
Application areas
The single crystals can be used to develop efficient lasers with high radiating power.
Stage of development and place of usage
The production of experimental lots of crystals is established at the
Patent situation
Patent(s) can be grunted but not yet applied for.
Commercial proposals
Contract for product manufacturing and shipment.
Approximate cost
Agreed price.
Contacts
Nikolaev Institute of Inorganic Chemistry SB RAS
Acad. Lavrentyev ave., 3, Novosibirsk, Russia, 630090
Scientific secretary of Institute
Olga A. Gerasko, Doctor of chemical sciences
Phone: +7(383) 330-94-86
+7(383) 330-94-89
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