Bi₄Ge₃O₁₂ Crystals

Bismuth Germanate Crystals of Evlitine structure (Bi₄Ge₃O₁₂) became well – known primarily due to it’s wide application as scintillation material for high energy physics. However this crystal processes also relatively high electro-optic coefficients which makes it useful for building Pockels cells, particularly, for application in optical fiber electric field sensors with high thermal stability. The crystal can be used also for photorefractive devices working in the UV range.

ELAN fabricates custom designed elements of Bi₄Ge₃O₁₂ crystals grown by Czochralsky method and carefully selected and tested for high optical homogeneity, absence of bubbles, inclusions and other defects.

Material propeties

NOTE

1. If not specified, optical properties are given for wavelength 633 nm.
2. Finished elements are available in sizes (3–30)x(3–30)x(3–120) mm3.Wafers with dia. up to 60 mm, or 40x40 mm square, 0.5 - 10.0 mm thick are available.
3. Polish standard: 40/20 S/D, λ/2 flatness, parallelism < 3’
4. Coatings available:
      a) AR @ 514.5 nm, 532 nm or other on request
      b) ITO conductive/transparent coatings
      c) electrodes Cr + Au