β- BBO- β Barium Metaborate
β Barium borate (β-BaB2O4, β-BBO) combines many outstanding features, such as its high nonlinear optical coefficient, low group velocity dispersion, wide transparency range (1893500 nm), and high damage threshold. This unique combination ensures that β -BBO crystals become promising candidates for a variety of nonlinear optical applications (e. g., frequency converters and optical parametric oscillators). In the field of quantum optics, β-BBO crystals can be used to generate entangled photon pairs and ten-photon entanglement. BBO nonlinear crystal is a negative uniaxial crystal that can provide phase matching through various second-order interactions throughout its transparent range (from 185 nm to 3.3 µ m, based on transmittance measurements using crystal samples several millimeters thick), making it a widely used crystal for nonlinear frequency conversion in ultraviolet, visible, and near-infrared. In this regard, the BBO crystals are the most important nonlinear crystals used for the near-infrared light parameter pulse pulse amplifier. Currently, it provides only very few optical cycle pulses with high average power and ultra-high peak power.
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Overview
Specifications
| Parameter | Value |
|---|---|
| Crystal structure | Tripartite crystal system, space group R3c |
| Crystal lattice parameters | a=b=12.532Å, c=12.717Å, Z=6 |
| Melting point | About 1095℃ |
| Transformation point | 925±5℃ |
| Optical homogeneity | δn≈10-6/cm |
| Mohs (Mohs) hardness | 4 |
| Density | 3.85 g/cm3 |
| Absorbance index [at1064nm] | ＜0.1%/cm(at 1064nm) |
| Specific heat | 1.91J/cm3xK |
| Hygroscopy | low |
| Thermal expansion coefficient | α11=4 x 10-6/K; α33=36x 10-6/K |
| Heat conductivity | 1.2W/m/K（⊥c）; 1.6W/m/K（∥c） |
| Phase matching output wavelength | 190-1750nm |
| Nonlinear optical coefficient | d11=5.8 x d36(KDP)d31=0.05 x d11d22<0.05 x d11 |
| Photoelectric coefficient γ22 | γ22=2.7 pm/V |
| Half-wave voltage [@1064nm；3x3x20mm] | 7KV (@1064 nm,3x3x20mm) |
| Damage threshold@1064nm@ 532nm [10ns,10HZ,AR-coated；@1064nm@ 532nm] | 0.5GW/cm2(10ns, 10HZ, AR-coated)0.3GW/cm2(10ns, 10HZ, AR-coated) |
| Wavefront distortion [@633nm] | ≦λ/8 @ 633nm |
| Dimension tolerance | (W±0.1mm)x(H±0.1mm)x(L+0.5mm/-0.1mm)（L≥2.5mm）(W±0.1mm)x(H±0.1mm)x(L+0.1mm/-0.1mm)（L＜2.5mm） |
| Optical aperture | ≧90% |
| Flatness [@633nm] | λ/8 @ 633nm |
| Finish | 10/5 |
| Depth of parallelism | ≦20" |
| Verticality | ≦5 ′ |
| Angular deviation | △θ≦0.25°,△φ≦0.25° |
Applications
Key Features
Datasheet
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