LBO(LiB3Os) is an excellent nonlinear optical crystal. It's phase matchable for the SHG and THG of Nd:YAG and Nd:YLF lasers, using either type | or type II interaction. LBO is a nonlinear optical crystal perfectly suited for harmonic generation as well as sum frequency mixing and OPO applications using widely spread Nd lasers, Ti:Sapphire and Dye lasers. Such physical LBO properties as excellent optical homogeneity, non hygroscopicity and very high damage threshold assure long and stabile operation of crystal. LBO crystal is the first choice as harmonic generator of high peak power pulsed lasers.
Basic Properties:
Crystal Structure | Orthorhomic, Space group Pna21 Point group mm² |
Lattice Parameters | a=8.4473Å,a=73788Å,c=5.1395Å,z=2 |
Melting Point | About 8340C |
Mohs Hardness | 6 |
Density | 2.47g/cm³ |
Thermal Conductivity | 3.5W/m/K |
Thermal Expansion Coefficient | ax=10.8x10-5/K av=-8.8x10-5/K az=3.4x10-5/K |
Optical Properties:
Transparency Range | 160-2600nm |
SHG Phase Matchable Range | 551-2600nm(Type l) 790-2150(TypeⅡ) |
Refractive Indices | 1.0642mm nx=1.5656, nv=1.5905，ne=1.6055 |
0.5321mm nx=1.5785，nv=1.6065，ne=1.6212 |
0.2660mm nx=1.5973, nv=1.6286，ne=1.6444 |
Therm-Optic Coefficient(℃, λ in μ m) | dnx/dT=-9.3X10-6 dnyldT=-13.6X10-6 dnz/dT=(-6.3-2.1λ)X10-6 |
Absorption Coefficient | <0.1%/cm at 1664nm <0.3%/cm at 532nm |
LBO Coefficients | deff(Ⅰ)=d32cosΦ(Type Ⅰin XY plane) deff(Ⅰ)=d31cos2θ+d32sin2θ(Type Ⅰin XZ plane) deff(Ⅱ)=d31cosθ(Type Ⅱin YZ plane)， deff(Ⅱ)=d31cos2θ+d32in2θ(Type Ⅱin XZ plane) |
Non-vanished LBO Susceptibilities | d31=1.05士0.09pm/V |
d32=-0.98士0.09pm/V |
d33=0.05士0.006pm/V |
Sellmeier Equations (λ in μm) | nx2=2.454140+0.011249/(λ2-0.014591λ2-6.60x10-5λ4 |
ny2=2.539070+0.012711/ (λ2-0.012523)-0.018540λ2+2.0x10-4λ4 |
nz2=2.586179+0.013099/ (λ2-0.011893)-0.017968λ 2-2.26x10-4λ4 |
Capability
●Optical:
Attribute | Commercial | High Precision |
Dimensions | 30x30x30mm,60mm |
Wavefront Distortion | λ/8 | λ/8 |
Orientation | 士0.25° | 土0.2° |
End-faces Configuration | Flat |
Dimension Tolerance | ±0.1mm | ±0.01mm |
Surface Quality | 10-5 scratch and dig | 10-5 scratch and dig |
Flatness | λ/8 | λ/10 |
Parallelism | 20" | 10" |
Perpendicularity | 15 ' | 5 ' |
Intinsic Loss | Less than 0.1%/cm at 1064nm＇ |
●Coating:
> DBAR, Nd:YAG Laser
> Lower reflection, R<0.2% at 1064nm, R<0.5% at 532nm
> High damage threshold, >500MW/cm2 at both wavelengths 1064nm and 532nm
> High efficiency
> BBAR, Tunable Laser
> Customer designed coating
