Lithium Triborate (LBO) Crystals
- Wide Transparency Range: 160 nm to 2600 nm
- Broad Phase-Matching Capability: Suitable for SHG, THG, OPO, SFG, DFG across UV to IR
- High Damage Threshold: >2 GW/cm² for 1064 nm, 10 ns pulse
- Low Walk-Off Angle: Ideal for high-beam-quality laser systems
- High Nonlinear Coefficients: Enables efficient frequency conversion
- Excellent Optical Homogeneity: Δn < 10⁻⁶/cm
- Good Mechanical Hardness: Mohs hardness ~6
- Stable Physical and Chemical Properties: Resistant to humidity and environmental degradation
- Nonhygroscopic: No special humidity control required
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Description
Lithium Triborate (LBO) crystals are high-performance nonlinear optical (NLO) materials widely used in frequency conversion applications such as second harmonic generation (SHG), third harmonic generation (THG), optical parametric oscillation (OPO), and sum-frequency generation (SFG). LBO crystals are celebrated for their broad transparency range, high damage threshold, excellent optical homogeneity, wide phase-matching capability, and good mechanical and chemical stability. These features make LBO crystals a superior choice for high-power, high-stability laser systems in both industrial and scientific fields.
Key Features and Properties:
- Wide Transparency Range: 160 nm to 2600 nm
- Broad Phase-Matching Capability: Suitable for SHG, THG, OPO, SFG, DFG across UV to IR
- High Damage Threshold: >2 GW/cm² for 1064 nm, 10 ns pulse
- Low Walk-Off Angle: Ideal for high-beam-quality laser systems
- High Nonlinear Coefficients: Enables efficient frequency conversion
- Excellent Optical Homogeneity: Δn < 10⁻⁶/cm
- Good Mechanical Hardness: Mohs hardness ~6
- Stable Physical and Chemical Properties: Resistant to humidity and environmental degradation
- Nonhygroscopic: No special humidity control required
Typical Applications:
- Frequency doubling (SHG) of Nd:YAG, Nd:YVO₄, Nd:YLF lasers
- Tripling (THG) for producing UV wavelengths
- Optical parametric oscillators (OPO) and optical parametric amplifiers (OPA)
- Sum-frequency generation (SFG) and difference-frequency generation (DFG)
- High power, high repetition rate laser systems
- Tunable laser sources covering UV, visible, and near-IR regions
- Ultrafast pulse generation and amplification
Specifications:
| Chemical Formula | LiB₃O₅ |
| Crystal Structure | Orthorhombic |
| Space Group | Pna2₁ |
| Lattice Constants | a = 8.447 Å, b = 7.378 Å, c = 5.139 Å |
| Density | ~2.47 g/cm³ |
| Melting Point | 834°C |
| Hardness (Mohs) | ~6 |
| Transparency Range | 160 nm – 2600 nm |
| Nonlinear Coefficient (d₃₁) | ~0.85 pm/V |
| Damage Threshold | >2 GW/cm² at 1064 nm, 10 ns |
| Refractive Indices | n varies with wavelength |
| Phase-Matching Types | Type I and Type II |
| Surface Quality | 10/5 – 20/10 Scratch/Dig |
| Parallelism | <10 arc seconds |
| Flatness | <λ/8 @ 632.8 nm |
| Available Sizes | 3×3×10 mm³, 4×4×15 mm³, 5×5×20 mm³, custom |
| Coating Options | AR coated or uncoated, UV to IR coatings |
Material Properties and Crystal Structure:
- Chemical Formula: LiB₃O₅
- Crystal Structure: Orthorhombic
- Space Group: Pna2₁
- Lattice Constants: a = 8.447 Å, b = 7.378 Å, c = 5.139 Å
- Density: ~2.47 g/cm³
- Melting Point: 834°C
- Mohs Hardness: ~6
- Transparency Range: 160 nm – 2600 nm
- Refractive Indices: nₓ, nᵧ, n𝓏 varies with wavelength
- Nonlinear Coefficient (d₃₁): ~0.85 pm/V
- Damage Threshold: >2 GW/cm² at 1064 nm, 10 ns pulse
- Phase-Matching Types: Type I and Type II achievable
Standard Product Sizes and Availability:
- Typical dimensions: 3×3×10 mm³, 4×4×15 mm³, 5×5×20 mm³, custom sizes available
- Orientation:
- SHG phase matching at θ = 90°, φ = 0° (Type I at 1064 nm)
- Other customized phase-matching angles available
- Surface Quality: 10/5 to 20/10 Scratch/Dig (MIL-PRF-13830B standard)
- Parallelism: <10 arc seconds
- Flatness: <λ/8 @ 632.8 nm
- Surface Finish: Polished or as-cut
- Coatings: AR coatings for 1064 nm, 532 nm, 355 nm, 266 nm, custom coating services
Customization Options:
- Special phase-matching cuts and custom angles
- Custom sizes for specific laser cavity designs
- High damage threshold AR coatings for UV, VIS, or IR applications
- Special polishing and wedge angles for minimizing back reflections
- Bonded LBO crystals for advanced frequency conversion setups
- Temperature-tuned phase-matching designs
Packaging and Delivery:
- Packaged in cleanroom-grade containers, Class 100 clean environment
- Protective cushioning against mechanical shock and moisture
- Sealed in moisture-proof, anti-static packaging
- Fast delivery: 2–4 weeks for standard sizes, 4–6 weeks for custom crystals
- Documentation included: Optical certification, phase-matching test report, coating specifications (if applicable)
Why Choose Our Lithium Triborate (LBO) Crystals?
- Over 10 years of experience in growing high-quality LBO crystals
- Advanced Czochralski pulling technique for superior crystal uniformity
- Rigorous quality control for optical homogeneity and phase-matching accuracy
- Capability to supply crystals from laboratory needs to mass production
- Custom-engineered solutions tailored to customer laser system requirements
- Comprehensive technical support and after-sales service
Ordering & Contact Information:
We offer flexible MOQ (Minimum Order Quantity), competitive pricing and global shipping. For custom orders or technical inquiries, please contact us for a detailed consultation!
