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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 germanite (Bi12GeO20, BGO) crystals are highly efficient photoconductors with a low dark conductivity, that allows a build-up of large photo-induced space-charges. Tremendous photoconductivity and electro-optic properties make BGO crystals attractive in a range of applications: spatial light modulators, optical switches, phase conjugation mixers. BGO crystals are grown by modified Czochralski method and available in up to 3‘‘ diameter aperture size.

Crystals can be supplied with ITO coatings on request.

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/-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
520 €
5x5 mm
5 mm
[100]
6871
520 €
10x10 mm
5 mm
[110]
6872
680 €
10x10 mm
5 mm
[100]
6873
680 €
20x20 mm
1 mm
[110]
6874
490 €
20x20 mm
1 mm
[100]
6875
490 €
30x30 mm
1,1 mm
[110], Edge is parallel with <001> plane ±2 deg
6876
590 €
30x30 mm
1,5 mm
[110]
6877
590 €