RAMAN CRYSTALS: KGW
RAMAN CRYSTALS: KGW
Description
KGW (potassium gadolinium tungstate) is a crystal that is commonly used as a Raman crystal in Raman spectroscopy. It is a colorless, transparent crystal that has a high Raman scattering efficiency and a strong Raman spectrum, making it suitable for a range of Raman applications.
KGW crystals are used as Raman scattering materials because they have strong Raman scattering at a number of different wavelengths. When a laser beam is directed onto the crystal, the photons in the laser beam interact with the crystal lattice, causing some of the photons to scatter in a different direction. The scattered photons have a different wavelength and energy than the incident photons, which creates a Raman spectrum.
KGW has a strong Raman spectrum that extends from the ultraviolet to the near infrared, making it useful for a range of applications. The crystal can be used as a reference material for Raman spectroscopy, as well as a sample for studying Raman scattering in the solid state.
In addition to its use as a Raman crystal, KGW is also used in other optical applications, such as in laser systems and as a scintillator in medical imaging.
| Transmission range, µm | 0.35 - 1.80 |
| Syngony | cubic |
| Symmetry, space group | P213 |
| Lattice parameter, Å | 8.11 |
| Density, g/cm3 | 3.25 |
| Mohs hardness | 2.5 - 3.0 |
| Refractive indexes: | - |
| at 0.5481 µm | 1.5758 |
| at 1.064 µm | 1.5551 |
| at 2.00 µm | 1.5452 |
| at 2.50 µm | 1.5399 |
| Stocks frequency shift, cm-1 | 1047 |
| Relative optical uniformity, ” n/cm | (3 - 7) x 10-6 |
Stokes | KGW pumped @532 nm | KGW pumped @1064 nm |
1 Stoke | 558 | 1177 |
2 Stoke | 588 | 1316 |
3 Stoke | 621 | 1494 |
4 Stoke | 658 | 1726 |
1 Antistoke | 507 | 970 |
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