• BBO
  • LBO
  • MgO:LiNbO3
  • LBO

    LBO(Lithium Triborate) is an excellent NLO crystal discovered by the CAS team (Chinese Academy of Sciences) in 1990s’. Now the crystal elements are most commonly useful for high power and high reliable green and violet lasers. LNG Optics dedicates in developing LBO crystals with Very large dimensions, Very Low bulk absorption level and Very high laser damage threshold. 

    Features & Standard specifications from LNG Optics:

    Dimensions: up to 100 x 100mm2

    Length: 0.1mm thin plates or up to 80mm long rod

    Orientation accuracy: ∆θ<±0.2°; ∆φ<±0.2°

    Bilk absorption: less than 10ppm @ 1064 & 532nm

    Flatness: λ/8 @ 633nm per inch

    Wavefront Distortion: λ/8 @ 633nm

    Surface Quality: 10/5 Scratch/Dig

    Clear Aperture: 90% central area

    Parallelism: 10 arc seconds

    Perpendicularity: 5 arc minutes

    Chamfers: 0.2mm x 45°+/-5°

    AR Coatings: AR/AR 1064+532nm, R<0.2% or AR 355nm, R<0.2%

    Damage Threshold, Coated: 1GW/cm2at 1064nm, 10ns pulse, 10Hz

    Damage Threshold, Polished: 10GW/cm2at 1064nm, 10ns pulse, 10Hz


    Physical & Chemical Properties:


    Chemical Formula:


    Crystal Structure:

    Orthorhombic, Space group Pna21, Point group mm2

    Lattice Parameters (Å):

    a=8.4473, b=7.3788, c=5.1395, Z=2

    Melting Point (°C):

    ~ 834

    Mohs Hardness:

    ~ 6 

    Density (gram/cm3):


    Hygroscopic susceptibility:


    Thermal Conductivity (W/m/K):


    Thermal Expansion Coefficient (K-1):

    αx=10.8x10-5, αy= -8.8x10-5, αz=3.4x10-5


    Optical & Nonlinear Properties:


    Transparency Range:

    160 - 2600 nm

    Phase Matching Range: 

    551-2600nm for Type I, 790-2150nm for Type II

    Thermo-Optic Coefficients:

    (oC-1, λ in μm)

    dnx/dT = - 9.3 x 10-6

    dny/dT = -13.6 x 10-6

    dnz/dT = (-6.3 - 2.1λ) x 10-6

    Sellmeier Equations: 

    (λ in μm)




    non-vanished Nonlinear susceptibilities:

    d31 = 1.05 ± 0.09 pm/V

    d32 = -0.98 ± 0.09 pm/V

    d33= 0.05 ± 0.006 pm/V