LBO crystal is an excellent frequency doubling crystal and is currently a widely used frequency doubling device. Its internal optical uniformity of the crystal is good, the transmission band is relatively wide, and it has high matching efficiency and laser damage threshold.
Application: laser frequency doubling, etc.
LBO crystal properties:
Wavelenght Range | 160~2600nm |
Density | 2.47g/cm2 |
Deliquescent | slight |
Moh'S Hardness | 4 |
Thermal Conductivity | αx=10.8 X10-6/K |
Nonlinear Optical Coefficients | d31=1.05±0.09pm/V d32=-0.98±0.09pm/V d33=0.05±0.006pm/V |
Absorption Coefficient | <0.1%/cm@1064nm |
Sellmeier Equation (λ in μm) | nx2=2.454140+0.011249/( λ2-0.011350)-0.014591 λ2-6.60x10-5 λ4 |
Product Processing Parameters:
Material | LBO |
Processing Thickness | 0.01mm-20mm |
Surface Quality | 10-5 |
Optical Axis Accuracy | 3' |
Parallelism | <10'' |
Surface Accuracy | λ/10@633nm |
Clear Aperture | >95% |
Coating | Can be coated according to customer needs |
Mount | According to customer requirements |
LBO is widely used for SHG and THG of Nd:YAG, Nd:YLF, Nd:YVO4 and ultra-fast Ti:sapphire lasers. OPOs(Optical Parametric Oscillators) and OPAs(Optical Parametric Amplifier).
Chemical Formula | LiB3O5 |
Crystal Structure | Orthorhombic, mm2 |
Cell Parameters | a = 8.4473, b = 7.3788Å, c = 5.1395Å, Z = 2 |
Melting point | 834°C |
Optical homogeneity | d n ~ 10-6/cm |
Mohs hardness | 6 |
Density | 2.47 g/cm3 |
Absorption coefficient | < 0.1%/cm (at 1064nm and 532nm) |
Specific heat | 1.91J/cm3xK |
Hygroscopic susceptibility | low |
Thermal expansion coefficients | a, 4 x 10-6/K; c, 36 x 10-6/K |
Thermal conductivity | ^ c, 1.2 W/m/K; //c, 1.6 W/m/K |
Linear Optical Properties:
Transparency range | 160-2600nm |
Refractive indices: | nx = 1.5656, ny = 1.5905, nz = 1.6055 |
Therm-optic coefficients | dno/dT = -9.3 x 10-6/°C |
Sellmeier Equations (l in mm) | |
no2 (l) = 2.7359 - 0.01354l2+ 0.01878/(l2-0.01822) |
Nonlinear Optical Properties:
Phase-matchable output wavelength | 554 - 2660nm (type I), 790 – 2150nm (type II) |
NLO coefficients | d33 = 0.06; d32 = 1.2; d22 = 1.1 |
Walk-off Angles(@ 1064nm) | 0.4° (Type I SHG), 0.3° (Type II SHG) |
Acceptance Angles(@1064nm) for SHG Type I | 9.6(mrad-cm) CPM at 25°C 248(mrad-cm) NCPM at 150°C |
Electro-optic coefficients | g11 = 2.7 pm/V, g22, g31 < 0.1g11 |
Conversion Efficiency | >90% (1064 -> 532nm) Type I SHG |
Damage threshold | 45 GW/cm2 (1 ns); 10 GW/cm2 (1.3 ns) |
LBO Specifications:
Thin crystals: (5-10) x (5-10) x (0.01-3) mm3 |
Regular sizes: 2 x 2 mm2 to 30 x 30 mm2 in cross section, up to 60 mm in length |
Absorption < 20ppm (0.00002%) @1064 |
S/D of 0/0 for cross section up to 5 x 5 mm |
Different cuts, sizes and AR coatings are available upon request. |