BSO and BGO
Bi12SiO20 (BSO, Bismuth Silicate) and Bi12GeO20 (BGO, Bismuth Germanite) single crystals are grown by the Czochralski method. The crystals have been widely used in Photorefractive, photoconductive, electro-optic, acousto-optic applications such as two-wave mixing, four-wave mixing, phase conjugation, real-time interferometry, optical date storage, surface acoustic devices, and electro-optic devices.
Basic Properties
|
Crystal |
Bi12SiO20 (BSO) |
Bi12GeO20 (BGO) |
|
Symmetry |
Cubic , 23 |
Cubic , 23 |
|
Melting Point |
900°C |
930°C |
|
Density |
9.2g/cm3 |
9.2g/cm3 |
|
Mohs Hardness |
4.5
|
4.5 |
|
Transparency Range |
450-7500nm |
70-7500nm
|
|
Transmittance @ 633nm |
69% |
67% |
|
Refractive Index @ 633nm |
2.54 |
2.55 |
|
Dielectric Constant |
56 |
40 |
|
Electro-Optic Coefficient |
r41 = 5×10-12 m/V |
r41 = 3×10-12 m/V |
|
Resistivity |
5×1011Ω·cm |
8×1011Ω·cm |
|
Loss Tangent |
0.0015 |
0.0035 |
Specifications
|
Polishing: |
2 faces or 6 faces |
|
Flatness: |
< λ /8 @ 633nm |
|
Wavefront Distortion: |
< λ /4 @ 633nm |
| Parallelism: | < 30″ |
| Surface Quality: | 20/10 to MIL-O-13830A |
Sinoceramics provides large sizes of BSO and BGO along with high quality. We provide as-cut and polished BSO and BGO crystals and <110> and <001> cut wafers. The size and orientation can be changed upon request by our customers.