BARIUM NITRATE CRYSTAL
| Barium nitrate crystals: |
Ba(NO3)2 |
| Crystal belongs to cubic system |
| Space group |
P213 |
| Unit cell dimension |
a = 8.11A |
| Density: |
3.25 g/cm3 |
| Moos' hardness: |
2.5 - 3.0 |
| Transmission range : |
0.35 - 1.8 mm |
| Index of refraction: |
n = 1.5551 (l = 1.06 mm) |
| Raman active mode |
1047 cm-1 |
| Relative parameter of optical uniformity (d n/cm): |
(3 - 7) x10-6 cm-1 |
| Crystals don't contain gas cavities and inclusions but sometimes several gas cavities (dimensions are about few microns) take place.
Barium nitrate crystals are relatively new and important material for SRS-converter, providing nonlinear conversion of radiation frequency of solid-state laser due to effect of SRS. Crystals provide the following characteristics of SHG-conversion for neodymium laser
(l = 0.53 mm):
|
| 1) radiation wavelength having conversion coefficient equal to 40-50 % |
0.56 mm |
| 2) radiation wavelength having conversion coefficient equal to 15% |
0.6 mm |
| Crystals are to be used for changing of laser frequency converter in tune lasers, that make it possible to improve operation of instruments.
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