BBO for EO
BBO has significant advantages over other materials in terms of laser power handling ability, temperature stability, and substantial freedom from piezoelectric ringing. Over the past decade BBO has become the material of choice for high power high repetition rate Pockels cells at a very wide wavelength range from 200 nm to 2500 nm.
Investigation of BBO as a Q-Switch for High-Power Applications
| Part No. | Description | Wavelength | Size | Price | Availability | Add to Cart |
Structural and Physical Properties:
| Crystal Structure | Trigonal, space group R3c, Point group 3m |
| Cell Parameters | a = b = 12.532 Å, c = 12.717Å, Z = 6 |
| Melting Point | 1095 °C |
| Transition Temperature | 925 °C |
| Mohs Hardness | 4 |
| Density | 3.85 g/cm3 |
| Specific Heat | 1.91 J/cm3 x K |
| Hygroscopic Susceptibility | Low |
| Thermal Expansion Coefficients | a, 4 x 10-6 /K; c, 36 x 10-6 /K |
| Thermal Conductivity | ⊥c, 1.2 W/m/K; //c, 1.6 W/m/K |
Linear Optical Properties:
| Transparency Range | 189-3500 nm |
| Optical Homogeneity | δn ~ 10-6 /cm |
| Absorption Coefficient | < 0.1% /cm (at 1064 nm) |
| Sellmeier Equations (λ in µm) |
no2=2.7359+0.01878/(λ2-0.01822)-0.01354λ2 ne2=2.3753+0.01224/(λ2-0.01667)-0.01516λ2 |
|
Refractive Indices |
no = 1.6545, ne = 1.5392 no = 1.6606, ne = 1.5444 no = 1.6742, ne = 1.5547 no = 1.6930, ne = 1.5679 no = 1.7585, ne = 1.6126 |
| Thermo-optic Coefficients | dno/dT = -9.3 x 10-6 /°C dne/dT = -16.6 x 10-6 /°C |
Nonlinear Optical Properties:
| Phase-matchable SH Wavelengths: | 189 - 1750 nm |
| NLO Coefficients (x//m) |
d11 = 5.8 x d36(KDP) =2.26 pm/V d31 = -0.05 x d11 = -0.11 pm/V |
| Effective Nonlinearity Expressions | dooe = d11 cos3φ * cosθ - d31 sinθ deoe = d11 sin3φ * cos2θ |
| Electro-optic Coefficients | γ11 = 2.7 pm/V, γ13, γ33 < 0.1 γ11 |
| Half-wave Voltage | 48 kV (at 1064 nm) |
| Damage Threshold at 1064 nm (for reference only) |
5 GW/cm2 (TEM00 mode, 10 ns, 10Hz) * The actual beam profile, thermal management, lab humidity/cleanliness can affect the damage threshold significantly. |
Specifications of BBO EO components:
| Wavefront Distortion: | Less than λ/8 @ 633 nm |
| Dimension Tolerance: | (W+/-0.1 mm) x (H+/-0.1 mm) x (L+0.5/-0.1 mm) |
| Clear Aperture: | > 85% central area |
| Flatness: | Better than λ/8 @ 633 nm |
| Surface Quality: | Scratch/Dig 10/5 per MIL-O-13830A |
| Parallelism: | Better than 20 arc seconds |
| Perpendicularity: | 5 arc minutes |
| Angle Tolerance: | Δθ < 0.25o, Δφ < 0.25o |
Coatings:
Uncoated crystals or crystals with high quality AR coatings are available upon request.
AR Coatings: R < 0.2% at the central wavelength,
Broadband AR: R < 1% over the specified range.
Half Wavelength Votages:
| Part No. | Description | Vπ (kV) |
| EOB3150-AR1064 | BBO crystal for E-O application, z-cut, size 3x3x15 mm, z-faces AR coated @ 1064 nm,x-faces Au coated for electrodes | 4.4 |
| EOB3180-AR1064 | BBO crystal for E-O application, z-cut, size 3x3x18 mm, z-faces AR coated @ 1064 nm, x-faces Au coated for electrodes | 3.6 |
| EOB3200-AR1064 | BBO crystal for E-O application, z-cut, size 3x3x20 mm, z-faces AR coated @ 1064 nm, x-faces Au coated for electrodes | 3.3 |
| EOB3250-AR1064 | BBO crystal for E-O application, z-cut, size 3x3x25 mm, z-faces AR coated @ 1064 nm, x-faces Au coated for electrodes | 2.6 |
| EOB4250-AR1064 | BBO crystal for E-O application, z-cut, size 4x4x25 mm, z-faces AR coated @ 1064 nm, x-faces Au coated for electrodes | 3.5 |
| EOB6250-AR1064 | BBO crystal for E-O application, z-cut, size 6x6x25 mm, z-faces AR coated @ 1064nm, x-faces Au coated for electrodes | 5.2 |
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