LBO(Lithium borate, LiB3O5)
Feature
Broad transparency range from 160nm to 2600nm (see Figure 1);
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.
Chemical and Structural properties of LBO:
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Crystal Structure
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Orthorhombic, Space group Pna21, Point group mm2
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Lattice Parameter
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a=8.4473?, b=7.3788? , c=5.1395? , Z=2
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Melting Point
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About 834℃
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Mohs Hardness
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6
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Density
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2.47 g/cm3
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Thermal Conductivity
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3.5W/m/K
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Thermal Expansion Coefficient
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ax=10.8x10-5/K, ay= -8.8x10-5/K, az=3.4x10-5/K
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For more information about LBO (Lithium borate, LiB3O5)
Specifications
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Transmitting wave front distortion
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less than λ/8 @ 633nm
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Dimension tolerance
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(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)
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Clear aperture
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central 90% of the diameter
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Flatness
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λ/8 @ 633nm
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Scratch/Dig code
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better than 10/ 5 to MIL-PRF-13830B
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Parallelism
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better than 20 arc seconds
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Perpendicularity
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≤5 arc minutes
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Angle tolerance
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△θ≤±0.25°,△φ≤±0.25°
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Damage threshold[GW/cm2 ]
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>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)
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Quality Warranty Period
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one year under proper use
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NOTES
1. LBO has a very low susceptibility to moisture. Users are advised to provide dry conditions for both the use and preservation of LBO.
2. Polished surfaces of LBO requires precautions to prevent any damage
