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CEO
Tadas Lipinskas +370 5 219 4884
BGO crystals
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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
Request custom View stock
  • 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 €