CN EN

Precision Optics Crystals Ferrule&Tubing Precision Glass Molding Assembly Passive Optics Coatings Product Catalog Download

α -BBO Crystal


High temperature form BBO (α -BaB2O4) are negative uniaxial crystals. They have large birefringence over a broad transparent range of 190nm to 3500nm. Casix succeeded in growing these crystals to large sizes. The physical, chemical, thermal and optical properties of α -BBO crystals are similar to those of ß -BBO. However, the nonlinear optical properties of α -BBO crystals are nonexistent due to the centric symmetry with its crystal structure. α -BBO crystals are not recommended for NLO processes.

a -BBO are excellent crystals to replace Calcite, TiO2 LiBbO3 etc. in Glan Taylor and Glan Thompson polarizers as well as walk-off beamsplitters, especially for high power and UV polarizers. This is due to their unique UV transparency, good mechanical properties and high damage threshold. Casix also manufactures and supplies Glan Laser, Glan Taylor, Glan Thompson polarizers and other beam displacers from high quality α -BBO crystals to replace Calcites in many applications, especially in UV and high power operations.

Basic Properties of α -BBO Crystals

  Transparency Range:  190 - 3500nm, see transparency curve
  Density:  3.85g/cm3
   Therm-Optic Coefficients:

 dno/dT = - 9.3X10-6/°C
 dne/dT = -9.3X10-6/°C

   Damage Threshold:

 @1064nm 1GW/cm2
 @355nm 500MW/cm2

   Optical Homogeneity:  Δ n~10-6/cm2
   Mohs Hardness:  4.5
   Hygroscopic Susceptibility:  Low

   Thermal Expansion Coefficients (in the

   range of 25°C-900°C):

 aa = 4X10-6/° K   ac = 36X10-6/° K
  Linear Absorption Coefficients:  α<0.005cm-1 from 300nm to 2300nm

  Refractive Indices, Birefringence (Δne =

   no) and Walk-off Angle at 45° (β):

 @1.0642μm  ne=1.5379  no=1.6579  Δn=-0.1199  ρ=-4.287°
 @0.5321μm  ne=1.5534  no=1.6776  Δn=-0.1241  ρ=-4.387°
 @0.2660μm  ne=1.6114  no=1.7617  Δn=-0.1503  ρ=-5.082°

Capabilities:

AttributeCommercialHigh Precision
Surface Quality60-40 scratch and dig20-10 scratch and dig
Optical Axis Orientation±0.5°±0.2°
Flatnessλ/4λ/10
Wavefront Distortionλ/4λ/8
AR Coating
R<0.5% (narrow band wavelength)


Transparency Curve of α -BBO

a-BBO

 

 


Product Catalog Download

Detail
About us
Company Profile
Company History
Company Culture
Company Honor
Quality Control
Products
Precision Optics
Crystals
Ferrule&Tubing
Precision Glass Molding
Assembly
Passive Optics
Coatings
Product Catalog Download
Applications
Telecom
Laser
Medical
Instrument
Automotive
News
Company News
Industry News
Exhibition
Regulatory Compliance
Contact
Contact us
Message
Careers
CASIX Website

COPYRIGHT ©  CASIX, Inc ICP Number 2021000252   闽ICP备2021000252号       备案图标.png 闽公网安备 35011102350961号

Cookie

By continuing to use our website, you acknowledge the use of cookies.