LBO
LBO
LBO crystal is an excellent nonlinear optical crystal. For frequency doubling (SHG), tripling (THG)
of Nd:YAG, Nd:YLF, Nd:YVO4 lasers, it is one of the most useful nonlinear optical materials in
ultraviolet and visible laser applications.
Product Presentation
² broad transparency range from 160nm to 2.6mm(SHG range from 0.55m to 2.6mm)
² relatively large effective SHG coefficient (about three times larger than that of KDP)
² high damage threshold (18.9 GW/cm2 for a 1.3ns laser at 1.054mm)
² type I and type II non-critical phase-matching (NCPM) over a wide wavelength range
² wide acceptance angle and small walk-off
² More than 480 mW output at 395 nm is generated by frequency-doubling a 2W mode-locked Ti:Sapphire laser (<2ps, 82MHz). The wavelength range of 700 - 900 nm is covered by a 5x3x8 mm3 LBO crystal
² The frequency-doubling of a Spectra-Physics TFR diode pumped Nd:YLF laser ( > 500 mJ @ 1047 nm, < 7 ns, 0-10 KHz) reaches over 40% conversion efficiency in a 9 mm LBO.
² The VUV output at 187.7 nm is obtained by sum-frequency generation
² 2mJ/pulse diffraction-limited beam at 355 nm is obtained by intracavity tripling a Q-switched Nd:YAG laser
Crystal Structure | Orthorhombic, Space group Pna21, Point group mm2 |
Lattice Parameter | a = 8.4473Å, b = 7.3788Å, c = 5.1395, z=2 |
Melting Point | 834oC |
Mohs Hardness | 6 |
Density | 2.47 g/cm3 |
Thermal Expansion Coefficient | ax =10.8 X 10-5/K, ay =-8.8 X 10-5/K, az =3.4 X 10-5/K |
Absorption coefficient | < 0.1%/cm at 1064 nm, < 0.3%/cm at 532 nm |
Transparency Range | 160-2600nm |
SHG Phase Matchable Range | 551 ~ 2600nm (Type I) 790-2150nm (Type II) |
Therm-optic Coefficient (°C, λ in μm) | dnx/dT=-9.3X10-6 |
Absorption Coefficient | <0.1%/cm at 1064nm <0.3%/cm at 532nm |
Angle Acceptance | 6.54mrad-cm (φ, Type I,1064 SHG) |
Temperature Acceptance | 4.7°C-cm (Type I, 1064 SHG) |
Spectral Acceptance | 1.0nm-cm (Type I, 1064 SHG) |
Walk-off Angle | 0.60° (Type I 1064 SHG) |
NLO Coefficients | deff(I)=d32cosΦ (Type I in XY plane) |
Non-vanished NLO susceptibilities | d31=1.05 ± 0.09 pm/V |
Sellmeier Equations(λ in μm) | nx2=2.454140+0.011249/(λ2-0.011350)-0.014591λ2-6.60x10-5λ4 |