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BGO Kristalle

Haupteigenschaften

Hoher elektro-optischer Koeffizient (r41= 3,5 pm/V)
Geringer Dunkelstrom
Bauteile großer Abmessungen oder Wafers bis zu 3”
Individuelle Anpassung auf Anfrage

Anwendungsbeispiele

Räumliche Lichtmodulatoren
Optische Schalter
Optische Korrelatoren

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Beschreibung
Eigenschaften
Standardspezifikationen

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/-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/4@632,8 nm
Coatings	Uncoated
Mount	Unmounted