Description
Items Notes：
- Size, mm: The first lists the dimensions of the crystal in millimeters; W*H*L(mm)
- θ, deg: The second represents the phase-matching angle θ in degrees. This is the angle at which phase matching occurs for nonlinear optical processes.
- φ, deg: The third represents the azimuthal angle φ in degrees. This angle specifies the orientation of the crystal axis in the plane perpendicular to the propagation direction.
- Coating: The fourth describes the coating applied to the crystal, specifying the wavelength range for which the coating is optimized (e.g., P/P @ 400-800 nm).
Description: Lithium Triborate (LBO) is a nonlinear optical crystal widely used in various applications due to its high transparency range, significant nonlinear coefficients, and excellent phase matching capabilities. It is extensively employed in laser technology, frequency conversion, and electro-optic applications.
Physical and Chemical Properties of LBO Crystal:
- 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: Approximately 6
- Thermal Conductivity: 3.5 W/m·K
Optical Properties:
- Refractive Index:
- n₁ = 1.600 (at 0.532 µm)
- n₂ = 1.605 (at 0.532 µm)
- Transmission Range:
- 0.16 µm to 2.6 µm
- Nonlinear Coefficient: d₃₁ = 1.1 pm/V
Nonlinear Optical Properties:
- Phase Matching: Supports type I and type II non-critical phase matching (NCPM)
- Damage Threshold: >25 GW/cm² for 1064 nm, 10 ns pulses
- Effective Nonlinear Coefficient: deff = 1.16 pm/V
Standard Specifications
| Specification | Value |
|---|---|
| Flatness | λ/8 at 633 nm |
| Parallelism | < 20 arcsec |
| Surface Quality | 10 – 5 scratch & dig (MIL-PRF-13830B) |
| Perpendicularity | < 5 arcmin |
| Angle Tolerance | < 30 arcmin |
| Aperture Tolerance | ± 0.1 mm |
| Clear Aperture | 90% of full aperture |
Physical and Optical Properties of LBO Crystal
| Property | Value |
|---|---|
| Chemical Formula | LiB₃O₅ |
| Crystal Structure | Orthorhombic, mm2 |
| Optical Symmetry | Negative biaxial |
| Space Group | Pna2₁ |
| Density | 2.47 g/cm³ |
| Mohs Hardness | 6 |
| Optical Homogeneity | Δn = 10⁻⁶ cm⁻¹ |
| Transparency Region | 155 – 3200 nm |
| Linear Absorption Coefficient at 1064 nm | < 0.01% cm⁻¹ |
| Refractive Indices (nx) | |
| at 1064 nm | 1.5656 |
| at 532 nm | 1.5785 |
| at 355 nm | 1.5971 |
| Refractive Indices (ny) | |
| at 1064 nm | 1.5905 |
| at 532 nm | 1.6065 |
| at 355 nm | 1.6275 |
| Refractive Indices (nz) | |
| at 1064 nm | 1.6055 |
| at 532 nm | 1.6212 |
| at 355 nm | 1.6430 |
| Sellmeier Equations (λ, µm) | |
| nx² | 2.5390 + 0.01277 / (λ² – 0.01189) – 0.01849 λ² + 4.3025 x 10⁻⁵ λ⁶ – 2.913 x 10⁻⁵ λ⁶ |
| ny² | 2.4542 + 0.01277 / (λ² – 0.01135) – 0.01388 λ² |
| nz² | 2.5865 + 0.0131 / (λ² – 0.01223) – 0.01862 λ² + 4.5778 x 10⁻⁵ λ⁴ – 3.2526 x 10⁻⁵ λ⁶ |
| Phase Matching Range Type 1 SHG | 554 – 2600 nm |
| Phase Matching Range Type 2 SHG | 790 – 2150 nm |
| NCPM SHG Temperature Dependence | |
| Type 1 Range 950 – 1300 nm | T1 = -1893.3λ⁴ + 8886.3λ³ – 13019.8λ² + 5401.5λ + 863.9 |
| Type 1 Range 1300 – 1800 nm | T2 = 878.1λ⁴ – 6954.3λ³ + 20734.2λ² – 26378λ + 12020 |
| Type 2 Range 1100 – 1500 nm | T3 = 21630.6λ⁴ + 112521λ³ – 220460λ² + 194153λ – 64614.5 |
| NCPM SHG at 1064 nm Type 1 Temperature | 149°C |
| NCPM SHG at 1319 nm Type 2 Temperature | 43°C |
| Walk-off Angle | 7 mrad (Type 1 SHG 1064 nm) |
| Thermal Acceptance | 6.4 K x cm (Type 1 SHG 1064 nm) |
| Angular Acceptance | 6.5 mrad x cm (Type 1 SHG 1064 nm) |
| Nonlinearity Coefficients | |
| d₃₁ | (1.05 ± 0.09) pm/V |
| d₃₂ | (0.98 ± 0.09) pm/V |
| d₃₃ | (0.05 ± 0.006) pm/V |
| Effective Nonlinearity | |
| XY Plane | dₑₒₑ = d₃₁ cosφ |
| YZ Plane | dₑₒₑ = d₃₁ cosφ |
| Expansion Coefficients | |
| α₁₁ | 10.8 x 10⁻⁶ K⁻¹ |
| α₃₃ | 3.4 x 10⁻⁶ K⁻¹ |
| Laser Induced Damage Threshold | |
| > 10 GW/cm² at 1064 nm, 10 ns | |
| > 200 GW/cm² at 800 nm, 100 fs, 10 Hz |
Applications:
- Frequency Doubling: Widely used for second harmonic generation (SHG) of lasers, including Nd and Nd
lasers.
- Optical Parametric Oscillators (OPOs): Suitable for generating tunable wavelengths.
- Electro-Optic Modulators: Employed in high-speed electro-optic applications.
- Ultraviolet (UV) Generation: Effective in producing UV light through nonlinear processes.
Processing and Handling LBO Crystal:
- Surface Protection: To maintain the integrity of LBO crystals, a protective coating may be applied during handling and processing.
- Machining: Requires careful handling to avoid damage to the crystal structure during milling or other machining processes.
Why Choose Shape Optics?
At Shape Optics, we pride ourselves on our comprehensive expertise and advanced capabilities in the field of optical materials and components. Our commitment to quality and innovation has positioned us as a leader in the industry, serving a diverse range of applications from scientific research to industrial manufacturing.
- Advanced Manufacturing: Shape Optics utilizes state-of-the-art equipment and techniques to ensure the highest precision and quality in our products. Our manufacturing processes are designed to meet the stringent demands of modern optical applications.
- Customization: We understand that every project is unique. Shape Optics offers customized solutions tailored to meet the specific needs of our clients. Whether you require specific dimensions, coatings, or performance characteristics, we have the flexibility to deliver.
- Quality Assurance: Our rigorous quality control processes ensure that every product we deliver meets the highest standards of performance and reliability. Shape Optics is committed to continuous improvement and excellence in all aspects of our operations.
- Expertise and Support: With a team of highly skilled professionals, Shape Optics provides unparalleled technical support and expertise. Our team is dedicated to helping you achieve optimal results in your optical applications.
- Global Reach: Shape Optics serves clients worldwide, providing reliable and timely delivery of products. Our global network ensures that we can meet your needs wherever you are located.
- Sustainability and Responsibility: Shape Optics is committed to sustainable practices and responsible manufacturing. We strive to minimize our environmental impact while delivering high-quality optical solutions.
Lithium Triborate (LBO) crystals from Shape Optics represent the pinnacle of quality and performance in optical materials. With our advanced capabilities, commitment to quality, and customer-centric approach, Shape Optics is your ideal partner for all your optical needs. Explore the possibilities with our LBO crystals and experience the Shape Optics difference.
For more information, please visit our website at Shape Optics or contact us directly to discuss your specific requirements.
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