Beta-BaB2O4(BBO)
Beta-BaB2O4 is a nonlinear optical crystal which combines a number of unique features. These features include wide transparency and phase matching ranges, large nonlinear coefficient, high damage threshold and excellent optical homogeneity. Therefore, BBO provides an attractive solution for various nonlinear optical applications.
- Main Features
Good mechanical and physical properties
Broad phase watchable second-harmonic-generation (SHG) range from 409.6 nm to 3500 nm
Wide transmission region from 190 nm to 3500 nm
Large effective SHG coefficient
High damage threshold of 10 GW/cm2 for 100 PS pulse-width at 1064 nm
High optical homogeneity with Δn=10-6/cm
Wide temperature-bandwidth of about 55℃ (for type I SHG 1064 nm)
BBO crystal is also an excellent electroscopic crystal for high-power applications at the wavelength range from 200 nm to 2500 nm. It can be used for Q-Switching in a CW diode pumped Nd:YAG laser with average power>50W.
2. Typical Applications
Second, third, fourth and fifth harmonic generation of Nd:YAG and Nd:YLF laser
Frequency-doubling, -tripling and -mixing of Dye lasers
Second, third and fourth harmonic generation of Ti:Sapphire and Alexandrite lasers
Optical parametric amplifier (OPA) and optical parametric oscillators (OPO)
Frequency-doubling of Argon ion, Cu-vapor and Ruby lasers
Research and development for advanced laser techniques, including all-solid state wide-tunable lasers, ultrafast pulse lasers, and DUV lasers
>Wide temperature-bandwidth of about 55℃ (for type I SHG 1064 nm)
3. Physical and Chemical Properties:
| Crystal Structure | Trigonal, space group R3c |
| Cell Parameters | a=b=12.532Å, c =12.717Å, Z=6 |
| Melting point | 1095°C |
| Mohs hardness | 4 |
| Density (gram/cm3) | 3.85 |
| Hygroscopic Susceptibility | low |
| Thermal Conductivity (W/m/K) | ⊥c: 1.2, c: 1.6 |
| Thermal Expansion Coefficients (K-1) | α11= 4 x 10-6, α33= 36 x 10-6 |
| Resistivity (ohm • cm) | > 1011 |
| Relative Dielectric Constant | εs11/ε0= 6.7, εs33/ε0= 8.1 |
4. Optical and Nonlinear Properties:
| Transparency Range | 190-3500 nm |
| Phase Matching Range | 409.6-3500nm |
| Electro-Optics Coefficients (pm/V) | γ22= 2.7 |
| Thermo-Optic Coefficients (°C-1) | dno/dT= -16.6 x 10-6, dne/dT = -9.3 x 10-6 |
5. Specifications:
| Apertures | Up to 20x20mm2 |
| Length | Up to 25mm |
| Dimension Tolerance | (W±0.1mm) x ( H±0.1mm) x (L+0.2mm/-0.1mm) |
| Phase Matching Angle Tolerance | Δθ< 0.25o, Δφ< 0.25o |
| Flatness | λ/10 @ 633nm |
| Transmitted Wavefront Distortion | < λ/8 @ 633nm |
| Surface Quality | 10/5 scratch/dig |
| Parallelism | < 20 arc seconds |
| Perpendicularity | < 5 arc minutes |
| Clear Aperture | 90% central area |
| Edge Bevel | 0.15mm x 45°±5°chamfer |
| AR Coating | R < 0.2% @ 1064nm, R < 0.5% @ 532nm |
| Damage Threshold of AR Coating | 500 MW/cm2for 1064nm, 10ns pu |
BBO crystal is also an excellent electroscopic crystal for high-power applications at the wavelength range from 200 nm to 2500 nm. It can be used for Q-Switching in a CW diode pumped Nd:YAG laser with average power>50W.
BBO crystal is damaged easily during transportation. So solid package and safe shipment is very important.
A-Star also has many stock BBO crystals sales.
A-Star Photonics can make as thin as 0.005 mm with a 1 mm FS substrate.
A-Star Photonics guaranteed 10 workdays rapid delivery for most dimensions.
Pls. don’t hesitate email or call us if you have any questions. We promise you must satisfy our price and service!
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