Yantai ZK Optics Co., Ltd.
Custom fabrication of high precision glass parts. Spirit of enterprise: Integrity, Pragmatism, Innovation, Win-win, Appreciation. Tenet of enterprise: the Supremacy of Customer, the Excellence in
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α-BBO α Barium metaborate crystal
Barium metaborate (α-BBO) crystal is an excellent birefringent material with excellent optical properties and excellent transmittance in both ultraviolet and mid infrared. α-BBO crystals have good internal quality, low absorption, and are widely used in high extinction ratio and deep ultraviolet laser systems due to their excellent ultraviolet transmittance. They are mainly processed into Glan polarization prisms, polarization beam splitters, compensators, and so on.
Application: Gran prism, polarization beam splitter, compensator, etc
Specifications:
| Diameter: | Max 50m |
| Length: | Max 35mm |
| Surface Quality: | better than 20/10 scratch/dig |
| Beam Deviation: | < 3 arc min |
| Optical Axis Orientation: | +/-0.2deg |
| Flatness: | < λ/4 @632.8nm |
| Wavefront Distortion: | < λ/2 @632.8nm |
| Coating: | Coating upon Request |
Properties:
| Transmitting range | 189nm~3500nm |
| Density | 3.85g/cm3 |
| Therm-Optic Coefficients | dno/dT=-9.3 x 10-6/ °C dno/dT=-16.6x10-6/ °C |
| Optical Homogeneity | Δn≈10-6/cm |
| Mohs Hardness | 4.5 |
| Damage Threshold | 1GW/cm2 at 1064nm 500MW/cm2 at 532nm |
| Hygroscopic Susceptibility | Low |
| Thermal Expansion Coefficients | αa=4x10-6 |
| (25 °C - 900 °C) | αa=4x10-6 |
| Linear Absorption Coefficients | a<0.005cm-1 from 300nm to 2300nm |
| Refractive Indices, Birefringence(△n=ne-no) and wal-off Angle at 45 °C(ρ) |
ne=1.58462,no=1.65790,Dn=-0.073282;ρ=-4.9532° at 1064nm ne=1.60206,no=1.67755,Dn=-0.075491;ρ=-5.0407° at 532nm ne=1.67190,no=1.76171,Dn=-0.089805;ρ=-5.6926° at 266nm |
| Sellmeier equation(l in μm) | no2=2.7471+0.01878/( λ2-0.01822)-0.01354 λ2 ne2=2.37153+0.01224/( λ2-0.01667)-0.01516 λ2 |