BGO crystals
Main features
- High electro-optic coefficient (r41= 3,5 pm/V)
- Low dark conductivity
- Large size elements or wafers up to 3”
- Customization available upon request
Application examples
- Spatial light modulators
- Optical switches
- Optical correlators
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- Description
- Properties
- Standard specifications
Bismuth germanate (Bi12GeO20, BGO) crystals are highly efficient photoconductors with low dark conductivity, that allows a build-up of large photo-induced space-charges. Tremendous photoconductivity and electro-optic properties rise BSO crystals to be used for a range of applications: spatial light modulators, optical switches, phase conjugation mixers. BSO crystals are grown by modified Czochralski method and available up to 3‘‘ diameter aperture size.
| Main properties | Chemical formula | Bi12GeO20 |
|---|---|
| Crystal Structure | cubic, point group 23 |
| Lattice Parameters | 10,15 Å |
| Density | 9,2 g/cm3 |
| Transmission Range | 0,45-7 µm |
| Refractive Index @0.63µm | 2,55 |
| Optical Activity @500 nm | 41,5 deg/mm |
| Electro-Optic Coefficient r41 | 3,5 pm/V |
| Dielectric Constant | 40 |
| Dark Resistance | 1014 Ohm cm |
| BGO crystals | |
|---|---|
| Clear aperture | 85% |
| Face dimensions tolerance | +0/-0,2 mm |
| Thickness tolerance | ±0,2 mm |
| Parallelism error | <30 arcsec |
| Protective chamfers | <0,3 mm at 45° |
| Surface quality | 40-20 S-D |
| Wavefront distortion | <λ/[email protected],8 nm |
| Coatings | Uncoated |
| Mount | Unmounted |
Order your item
Face dimensions
Length
Orientation
SKU
price
quantity
5x5 mm
5 mm
[110]
6868
600 €
5x5 mm
5 mm
[100]
6871
600 €
10x10 mm
5 mm
[110]
6872
900 €
10x10 mm
5 mm
[100]
6873
900 €
20x20 mm
1 mm
[110]
6874
540 €
20x20 mm
1 mm
[100]
6875
540 €
30x30 mm
1 mm
[110], Edge is parallel with <001> plane ±2 deg
6876
650 €
30x30 mm
1,5 mm
[110]
6877
650 €
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