← Back to product family
Lithium Triborate – LBO Crystals SKU: LBO-0423-40
Lithium Triborate (LBO) is a nonlinear optical crystal with a combination of unique features: • Wide transparency region • Broad Type 1 and Type 2 non-critical phase-matching (NCPM) range • Small walk-off angle • High damage threshold • Wide acceptance angle • High optical…
Variant specifications
| Specification | Value |
|---|---|
| W | 3 |
| H | 3 |
| L | 15 |
| θ | 43.3 |
| φ | 90 |
| Coating | AR/AR @ 1064 + 532/355 nm |
Shared product specifications
These specifications apply across the Lithium Triborate – LBO Crystals product family.
| Chemical formula | LiB₃O₅ |
| Crystal structure | orthorhombic, mm² |
| Optical symmetry | Negative biaxial |
| Space group | Pna2₁ |
| Density | 2.47 g / cm³ |
| Mohs hardness | 6 |
| Optical homogeneity | ∂n = 10⁻⁶ cm⁻¹ |
| Transparency region at “0” transmittance level | 155 – 3200 nm |
| Linear absorption coefficient at 1064 nm | < 0.01 % cm⁻¹ |
| Refractive indices: / at 1064 nm / at 532 nm / at 355 nm | nx ny nz / 1.5656 1.5905 1.6055 / 1.5785 1.6065 1.6212 / 1.5971 1.6275 1.6430 |
| Sellmeier equations (λ, μm) | nx² = 2.4542 + 0.01125 / (λ² – 0.01135) – 0.01388 λ² |
| ny² = 2.5390 + 0.01277 / (λ² – 0.01189) – 0.01849 λ² / + 4.3025 × 10⁻⁵λ⁴ - 2.9131 × 10⁻⁵λ⁶ | |
| nz² = 2.5865 + 0.01310 / (λ² – 0.01223) – 0.01862 λ² / + 4.5778 × 10⁻⁵λ⁴ - 3.2526 × 10⁻⁵λ⁶ | |
| 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 / Type 1 range 1300 – 1800 nm / Type 2 range 1100 – 1500 nm | T1 = - 1893.3λ⁴ + 8886.6λ³ – 13019.8λ² + 5401.5λ + 863.9 / T2 = 878.1λ⁴ – 6954.5λ³ + 20734.2λ² – 26378λ + 12020 / T3 = - 21630.6λ⁴ + 112251λ³ – 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×cm (Type 1 SHG 1064 nm) |
| Angular acceptance | 6.5 mrad×cm (Type 1 SHG 1064 nm) / 248 mrad×cm (Type 1 NCPM SHG 1064 nm) |
| Nonlinearity coefficients at 1064nm: | 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 / YZ plane | dooe = d₃₂ cosφ / doeo = deoo = d₃₁ cosθ |
| Expansion coefficients: | αx = 10.8 × 10⁻⁵K⁻¹ / αy = -8.8 × 10⁻⁵K⁻¹ / αz = 3.4 × 10⁻⁵K⁻¹ |
| Flatness | λ / 8 @ 633 nm |
| Parallelism | < 20 arcsec |
| Perpendicularity | < 5 arcmin |
| Angle tolerance | < 30 arcmin |
| Aperture tolerance | ± 0.1 mm |
| Surface quality | 10 / 5 scratch & dig per MIL-O-13830A |
| Clear aperture | 90% of full aperture |
Product brochures
Shared documentation for the complete product family.