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BSO Crytals

POC-OC-122514-BSO Crytals

  • High electro-optic coefficient (r41 = 5 pm/V) for exceptional modulation capabilities.
  • Superior phase-conjugation efficiency, ideal for advanced optical applications.
  • Available in large-size elements or wafers up to 3 inches in diameter.
  • Customization options, including coatings and dimensions, available on request.
  • Highly efficient photoconductors with low dark conductivity for better space-charge handling.

Customizable Components Available for This Material to Meet Your Specific Needs!

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General Description

Bismuth Silicon Oxide (Bi12SiO20 or BSO) is a highly efficient photoconductive material known for its low dark conductivity and excellent electro-optic properties. These characteristics allow for the accumulation of significant photo-induced space charges, making BSO crystals highly suitable for applications requiring high sensitivity and precise control. Grown through the Czochralski method, BSO crystals are available in dimensions up to 3 inches and are used in a wide range of photonic applications, including optical switches and waveguides. The unique optical and photoconductive properties make BSO a cost-effective and versatile solution in modern photonic systems.

General Applications and Examples

  • Spatial Light Modulators: Used in advanced imaging and optical communication systems.
  • Optical Switches: Ideal for high-speed, high-precision optical data routing.
  • Pockels Readout Optical Memory (PROM): Employed in data storage and retrieval systems leveraging electro-optic effects.
  • Optical Waveguides: Facilitating efficient light transmission in integrated photonic circuits.
  • Photorefractive Devices: BSO Crytals Applicable in holography and adaptive optics for dynamic imaging systems.

Chemical and Structural Properties

PropertyValue
Chemical FormulaBi12SiO20
Crystal StructureCubic, Point Group 23
Lattice Parameter10.10 Å
Density9.2 g/cm³
Mohs Hardness5
Transmission Range0.45–6 µm
Refractive Index2.54 @ 0.63 µm
Electro-optic Coefficientr41 = 5 pm/V
Dielectric Constant (Low Freq)56
Dark Resistance10^14 Ω·cm

Optical Properties

PropertyValue
Optical Activity42°/mm @ 500 nm
Wavefront Distortion<λ/4 @ 632.8 nm
Clear Aperture85%
Surface Quality40-20 S-D over clear aperture

Standard Fabrication Specifications

PropertyValue
Optical Activity42°/mm @ 500 nm
Wavefront Distortion<λ/4 @ 632.8 nm
Clear Aperture85%
Surface Quality40-20 S-D over clear aperture

Spectrum Transmission Curve

No specific spectrum transmission curves are available. The transmission range (0.45–6 µm) provides broad usability across visible and mid-infrared applications.

Coating Specification

  • Standard: Uncoated (ITO coatings available upon request).
  • Custom coatings can be provided based on application needs.
  • Adhesion Test: Compliant with MIL-C-675C military standards, an adhesion test involved applying a tape that meets LT-90 specifications onto the lens film layer. The tape was affixed fully and then removed vertically. This procedure was performed three times, resulting in no blistering or peeling.
  • Temperature Test: In line with MIL-C-675C specifications, test pieces were subjected to temperatures of -62±1℃ and 71±1℃. After maintaining them at room temperature (16℃~32℃) for two hours, the adhesion test was repeated, confirming no film detachment.
  • Abrasion Resistance Test: Conforming to MIL-C-675C and CCC-C-440 standards, the abrasion resistance test involved a gauze tester applying a minimum force of 1.0 lbs (0.45 kg) to the film. This was repeated 25 times with gauze widths of 1/4 inch (6.4mm) and 3/8 inch (9.5mm), ensuring no damage occurred to the film surface.
  • Humidity Test: Under MIL-C-675C criteria, the test piece was placed in a controlled temperature and humidity chamber set to 49 ±2℃ and 95%~100% humidity for 24 hours. The film remained intact, with no peeling, scratches, or other defects.
  • Solvent and Cleaning Testing: Following MIL-C-675C specifications, test pieces were exposed to room temperature conditions (16℃~32℃) and tested with acetone and alcohol for at least 10 minutes each. After air drying and subsequent cleaning with a cotton cloth soaked in alcohol, the film surface showed no signs of peeling or scratches.
  • Salt Spray Test: After 100 hours in a 35°C environment with a 5% saltwater concentration, the film showed no signs of damage.
Face Dimensions (mm)Length (mm)OrientationPrice (USD)
5 x 55[100]Request
10 x 105[100]Request
20 x 201.1[110]$490
25 x 251.1[110]$570
30 x 301.4[110]$690

POC-OC-122514-BSO Crytals

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