Fused Silica Optics Co.,LTD
Fused Silica Optics Co.,Ltd
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LBO Nonlinear Optical Crystal for Frequency Doubling
Fused Silica Optics supplies Lithium Triborate LiB3O5 or LBO, which is a newly developed nonlinear optical crystal. It is unique in many aspects, especially its wide transparency range, moderately high nonlinear coupling, high damage threshold and good chemical and mechanical properties. Its transmission range is from 0.21μm, to 2.3 μm,. LBO allows temperature-controllable non -critical phase-matching (NCPM) for 1.0-1.3 μm, Type I SHG, and also provides room temperature NCPM for Type II SHG at 0.8-1.1 μm. It possesses a relatively large angular acceptance bandwidth, reducing the beam quality requirements for source lasers.
Specifications
| Dimension tolerance | (W±0.1mm)x(H±0.1mm)x(L+0.5/-0.1mm) (L≥2.5mm) |
| (W±0.1mm)x(H±0.1mm)x(L+0.1/-0.1mm) (L<2.5mm) | |
| Clear aperture | central 90% of the diameter |
| Flatness | less than λ/8 @ 632nm |
| Transmitting wavefront distortion | less than λ/8 @ 632nm |
| Chamfer | ≤0.2mmx45° |
| Chip | ≤0.1mm |
| Scratch/Dig code | better than 10/ 5 to MIL-PRF-13830B |
| Parallelism | better than 20 arc seconds |
| Perpendicularity | ≤5 arc minutes |
| Angle tolerance | Δθ≤0.25°, ΔΦ≤0.25° |
| Damage threshold[GW/cm2) | >10 for 1064nm, TEM00, 10ns, 10HZ (polished only) |
| >1 for 1064nm, TEM00, 10ns, 10HZ (AR-coated) | |
| >0.5 for 532nm, TEM00, 10ns, 10HZ (AR-coated) | |
| * Quality Warranty Period: one year under proper use. | |
Chemical and Structural properties
| Crystal Structure | Orthorhombic, Space group Pna21, Point group mm2 |
| Lattice Parameter | a=8.4473Å, b=7.3788Å , c=5.1395Å , Z=2 |
| Melting Point | About 834℃ |
| Mohs Hardness | 6 |
| Density | 2.47 g/cm3 |
| Thermal Conductivity | 3.5W/m/K |
| Thermal Expansion Coefficient | ax=10.8x10-5/K, ay= -8.8x10-5/K, az=3.4x10-5/K |
Physical and Optical Properties
| Crystal Structure | Orthorhombic, point group mm 2 |
| Transparency Range | 160 - 2600 nm |
| Cell Parameters | a=8.44731Å, b=7.3788Å, c=5.1395Å |
| Melting Point | 834°C |
| Optical Homogeneity | Δn ≈ 10-6 /cm |
| Mohs Hardness | 6 |
| Density | 2.47g/cm3 |
| Phase-matchable SHG range | 800-2000nm |
| Absorption Coefficient | <=1%/cm at 1064nm |
| Damage Threshold at 1.064 mm | 24.6J/cm2; 18.9GW/cm2 |
| Refractive Indices: at 1.0642 mm Nx = 1.56447 Ny = 1.59050 Nz = 1.60538；at 0.5321 mm Nx = 1.57842 Ny = 1.60650 Nz = 1.62154 | |
Lithium Triborate (LiB3O5 or LBO) is an excellent nonlinear optical crystal discovered and developed by Fujian Institute of Research on the Structure of Matter, Chinese Academy of Sciences. Fused Silica Optics has the exclusive rights and Sufficient experience to produce, manufacture and market the patented LBO crystal and its NLO devices.
• Broad transparency range from 160nm to 2600nm;
• High optical homogeneity (dn»10-6/cm) and being free of inclusion;
• Relatively large effective SHG coefficient (about three times that of KDP);
• High damage threshold;
• Wide acceptance angle and small walk-off;
• Type I and type II non-critical phase matching (NCPM) in a wide wavelength range;
• Spectral NCPM near 1300nm.
LBO Base
| Speicfications: Material: .....................................LBO(LiB3O5 ) Orientation Tolerance: ...................0.3 degree Flatness: .........................................Lambda/4 Wavefront Distortion: ....................Lambda/10 Bevel: .....................................0.25x45 degree
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LBO Wedges
| Speicfications: Material: .....................................LBO(LiB3O5 ) Orientation Tolerance: ...................0.3 degree Flatness: .........................................Lambda/4 Wavefront Distortion: ....................Lambda/10 Bevel: .....................................0.25x45 degree
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