PRODUCTS
PRODUCTS
MESSAGES
Detail
-
α-BBO
- α-BBO (α-BaB2O4) is a negative uniaxial crystal which has large birefringence over a broad transparent range of 190nm to 3500nm. α-BBO is an excellent crystal especially in UV and high power applications. The physical, chemical, thermal and optical properties of α-BBO crystal are similar to those of β-BBO. However, the nonlinear optical properties of α-BBO crystal are nonexistent due to the centric symmetry with its crystal structure. α-BBO crystal is not recommended for NLO processes.
-
Advantages of α-BBO:
• High UV transmittance
• Large birefringence
• High damage threshold
• Stable physical and mechanical properties
Table 1. Basic Properties of α-BBO
Transparency Range |
190-3500nm |
Density |
3.85g/cm3 |
Hygroscopic Susceptibility |
Low |
Hardness (Mohs) |
4.5 |
Thermal Expansion Coefficients(/℃) |
9.3×10-6(C) 9.5×10-6(A) |
Damage Threshold |
1GW |
Refractive Indices |
no=1.6776,ne=1.5534,at 532nm no=1.6579,ne=1.5379,at 1064nm |
Sellmeier Equation(λ in μm) |
no2=2.7471+0.01878/(λ2-0.01822)-0.01354λ2 |
Table 2. Specifications of α-BBO
Size |
1mm-40mm |
Surface Quality |
10/5 |
Optical Axis Orientation |
6′ |
Parallelism |
<10″ |
Flatness |
λ/4 @ 633nm |
Clear Aperture |
>90% |
Coating |
AR-coating |
Mount |
Upon Customer’s Specification |
Figure 1. Transparency Curve
Inquiry List
Contact information
