BBO (Barium Borate) Crystal
Keywords:
Scintillation Crystals
- Product Introduction
- Key advantages
- Application areas
- Product Features
-
- Commodity name: BBO (Barium Borate) Crystal
β-BBO (β-Barium Borate) crystals is a unique nonlinear optical crystal that has gained significant recognition in the fields of optics and photonics, renowned for its wide transparency range, high damage threshold, and exceptional thermal stability.
Product Introduction
β-BBO (β-Barium Borate) crystals are a unique class of nonlinear optical crystals that have gained significant recognition in the fields of optics and photonics, renowned for their wide transparency range, high damage threshold, and exceptional thermal stability. Their key applications include laser frequency conversion, electro-optic modulation, and quantum optics. These crystals can efficiently double the frequency of lasers, effectively altering the wavelength of light—for instance, converting infrared light into visible light. Typically, BBO crystals are produced using the flux-growth method, which involves melting a mixture of barium borate and barium fluoride and then allowing the melt to cool slowly, enabling crystal formation.
Key advantages
- Offers a wide phase-matching bandwidth (409.6~3500 nm)
- Available across a wide wavelength range (190~3500 nm)
- High-frequency conversion efficiency (equivalent to 6 times that of KDP crystals)
- High damage threshold (10 GW/cm² at 1064 nm with a 100-ps pulse width)
- Temperature receiving angle width (around 55°C)
- Excellent optical uniformity: δn ≈ 10⁻⁶ /cm
- Temperature reception angle width (~55 ℃)Application Areas
- Second, third, fourth, and fifth harmonic generation of Nd:YAG and Nd:YLF lasers
- Frequency doubling, tripled frequency, and sum-frequency generation in dye lasers
- Second, third, and fourth harmonic generation of Ti:Sapphire and Alexandrite lasers
- Optical Parametric Amplifier (OPA) and Optical Parametric Oscillator (OPO)
- Frequency doubling of argon-ion, ruby, and Cu vapor lasers
- In the research and development fields of advanced, precision, and cutting-edge laser technologies such as all-solid-state tunable lasers, ultrafast pulsed lasers, and deep-ultraviolet lasers.Product Features
Material Properties
Crystal Structure
Trigonal, Space Group R3c
Lattice Constant
a=b=12.532Å, c=12.717Å, Z=6
Density
3.85 g/cm³
Mohs Hardness
4 Mohs
Transparency Range
190–3500 nm
Resistivity
>1011 ohm•cm
Electro-optic Coefficient
γ₂₂=2.7 pm/V
Acceptance Angle
0.8 mrad·cm (θ, Type I, 1064 SHG)
1.27 mrad·cm (θ, Type II, 1064 SHG)
Half-wave Voltage
7kV (@1064 nm, 3x3x20 mm³)
Absorption Coefficient
α<0.1%/cm@1064 nm
SHG Phase-Matching Range
409.6–3500 nm (Type I) 525–3500 nm (Type II)
Thermal Expansion Coefficient
α₁₁=4×10-6/K, α₃₃=36×10-6/K
Thermal Conductivity
1.2 W/m/K (⊥c); 1.6 W/m/K (∥c)
Refractive Index @ 1064 nm
ne=1.5425, nO=1.6551
Melting Point
1095°C
Product Processing Indicators
Effective Aperture
>90%
Dimensional Tolerance
(W±0.1 mm)×(H±0.1 mm)×(L±0.1 mm)
Chamfer
≤0.2×45°
Surface Quality
10-5 S-D
Flatness
≤λ/8 @ 632.8 nm
Wavefront Distortion
≤λ/8 @ 632.8 nm
Parallelism
<30"
Perpendicularity
≤15′
Chipped Edge
<0.1 mm
Damage Threshold
>1 GW/cm²@1064 nm, 10 ns, 10 Hz (anti-reflection coating)
>0.3 GW/cm²@532 nm, 10 ns, 10 Hz (anti-reflection coating)
> 1.5 GW/cm²@1064 nm, 10 ns, 10 Hz (polished wafer)
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- Offers a wide phase-matching bandwidth (409.6–3500 nm)
- Available across a wide wavelength range (190–3500 nm)
- High-frequency conversion efficiency (equivalent to 6 times that of KDP crystals)
- High damage threshold (10 GW/cm² at 1064 nm with a 100-ps pulse width)
- Temperature receiving angle width (around 55°C)
- Excellent optical uniformity: δn ≈ 10⁻⁶ /cm
- Temperature reception angle width (~55 ℃) -
- Second, third, fourth, and fifth harmonic generation of Nd:YAG and Nd:YLF lasers;
- Frequency doubling, tripling, and mixing in dye lasers;
- Second, third, and fourth harmonic generation with Ti:Sapphire and Alexandrite lasers;
- Optical Parametric Amplifier (OPA) and Optical Parametric Oscillator (OPO);
- Frequency doubling of argon-ion, ruby, and Cu vapor lasers;
- In the research and development fields of advanced, precision, and cutting-edge laser technologies such as all-solid-state tunable lasers, ultrafast pulsed lasers, and deep-ultraviolet lasers. -
Material Properties Lattice structure Trigonal crystal system, space group R3c Unit cell parameters a = b = 12.532 Å, c = 12.717 Å, Z = 6 Density 3.85g/cm3 Mohs Hardness 4Mohs Translucent wavelength band 190–3500 nm Resistivity >1011 ohm•cm Electro-optic coefficient γ22 = 2.7 pm/V Acceptance angle 0.8 mrad·cm (θ, Type I, 1064 SHG)
1.27 mrad·cm (θ, Type II, 1064 SHG)
Half-wave voltage 7kV (at 1064 nm, 3x3x20mm³) Absorption coefficient α < 0.1%/cm at 1064 nm
SHG Phase-Matching Range 409.6–3500 nm (Type I) 525–3500 nm (Type II) Coefficient of thermal expansion α11 = 4 × 10⁻⁶ /K, α33 = 36 × 10⁻⁶ /K
Thermal conductivity 1.2 W/m/K (⊥c); 1.6 W/m/K (∥c)
Refractive index @ 1064 nm ne = 1.5425, no = 1.6551 Melting point 1095°C Product Processing Metrics Effective Aperture >90% Dimensional Tolerance (W ± 0.1 mm) × (H ± 0.1 mm) × (L ± 0.1 mm) Protective Chamfer ≤0.2 × 45° Surface finish 10-5 S-D Flatness ≤λ/8 @ 632.8 nm Wavefront Distortion ≤λ/8 @ 632.8 nm Parallelism <30" Verticality ≤15′ Chipped edge <0.1 mm Damage threshold >1 GW/cm² @ 1064 nm, 10 ns, 10 Hz (anti-reflection coating)
> 0.3 GW/cm² @ 532 nm, 10 ns, 10 Hz (anti-reflection coating)
> 1.5 GW/cm² @ 1064 nm, 10 ns, 10 Hz (polished wafer)
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