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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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BSO Crytals Material 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

Property

Value

Chemical Formula

Bi12SiO20

Crystal Structure

Cubic, Point Group 23

Lattice Parameter

10.10 Å

Density

9.2 g/cm³

Mohs Hardness

5

Transmission Range

0.45–6 µm

Refractive Index

2.54 @ 0.63 µm

Electro-optic Coefficient

r41 = 5 pm/V

Dielectric Constant (Low Freq)

56

Dark Resistance

10^14 Ω·cm

Optical, Laser and Nonlinear Optical Properties

Property

Value

Optical Activity

42°/mm @ 500 nm

Wavefront Distortion

<λ/4 @ 632.8 nm

Clear Aperture

85%

Surface Quality

40-20 S-D over clear aperture

Standard Fabrication Specifications

Specification

Value

Clear Aperture

85%

Face Dimension Tolerance

±0.1–0.25 mm

Thickness Tolerance

±0.2 mm

Surface Flatness

<λ/4 @ 632.8 nm

Parallelism Error

<30 arcsec

Protective Chamfers

<0.3 mm at 45°

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.

POC Strength and Capabilities

 

Photonics On Crystals (POC) is a leader in photonic material solutions, offering high-quality BSO crystals with precision fabrication and advanced customization options. POC’s manufacturing expertise ensures low defect rates and high optical performance, catering to the needs of cutting-edge optical and photonic technologies.

Standard Products

Face Dimensions (mm)

Length (mm)

Orientation

Price (USD)

5 x 5

5

[100]

Request

10 x 10

5

[100]

Request

20 x 20

1.1

[110]

$490

25 x 25

1.1

[110]

$570

30 x 30

1.4

[110]

$690

POC-OC-122514-BSO Crytals

Related products

Coating Type

Specifications

AR Coating

R < 0.2% at 808 nm; R < 0.1% at 1064 nm

Custom Coatings

Gold or chrome plated; available on request