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Specifications
.1 High Precision2 Competitive Price
3 Quick Delivery
4 Custom Size Available
High Temperature form BBO ( a -BaB 2 O 4 ) is a negative uniaxial crystal. It has large birefringence over the broad transparent range from 189 nm to 3500 nm. The physical, chemical, thermal and optical properties of a-BBO crystal are similar to those of b-BBO. However, the nonlinear optical properties of a-BBO crystal is vanished due to the centric symmetry with its crystal structure. It is not recommended to use for NLO processes.
a -BBO is an excellent crystal to replace Calcite, TiO 2 , and LiNbO 3 , etc. in Glan-Taylor and Glan-Thompson polarizers as well as walk-off beam splitters, especially for high power and UV polarizer, due to its unique UV transparency, good mechanical properties and high damage threshold.CNPHOTONICS manufactures and supplies Glan-Laser, Glan-Taylor, Glan-Thompson Polarizers and other beam displacers from high quality a -BBO crystals to replace Calcite in many applications, especially in UV and high power operations.
1. Basic Properties of a -BBO
|
Transparency Range: 189 - 3500 nm, See Transparency Curve |
Transparency Curve of a -BBO |
Density: 3.85 g/cm 3 | |
Therm-Optic Coefficients: | |
Damage Threshold | |
Optical Homogeneity: Δn ≈ 10 -6 /cm | |
Mohs Hardness: 4.5 | |
Hygroscopic Susceptibility:Low | |
Thermal Expansion Coefficients |
a a = 4 x 10 -6 /K |
Linear Absorption Coefficients: a <0.005 cm -1 from 300 nm to 2300 nm | |
Sellmeier equations: (λ in mm) : | |
Refractive Indices, Birefringence ( Δn = n e - n o ) and Walk-off Angle at 45 o ( ρ): | |
Applications of a -BBO
Please refer to Polarizer for the applications of a-BBO
Specifications of a -BBO
| Surface Quality | 20/10 Scratch and Dig |
| Beam Deviation | <3 arc min. |
| Optical Axis Orientation | +/-0.5° |
| Flatness | λ/4 @ 632.8 nm |
| Transmission Wavefront Distortion | λ/2 @ 632.8 nm |
| AR-coating | R<0.5% |
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