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LBO crystal
    LBO (Lithium Triborate or LiB3O5) is an excellent crystal which has very wide transparency, high nonlinear coupling, high damage threshold and good chemical and mechanical properties
  • DETAIL
  • STANDARD PRODUCT
  • BASIC PROPERTIES

  • Applications:

        ● High power Nd:YAG and Nd:YLF lasers for R&D and military applications.

        ● Ti:Sapphire, Alexandrite and Cr:LiSAF lasers.

        ● Medical and industrial Nd:YAG lasers.

        ● Diode laser pumped Nd:YVO4, Nd:YAG and Nd:YLF lasers.

        ● Frequency-tripling (THG) of Nd:YAG and Nd:YLF lasers.

        ● Optical parametric amplifiers (OPA) and oscillators (OPO) pumped by Excimer lasers and harmonics of Nd:YAG lasers.

        ● Frequency doubling (SHG) and tripling (THG) of high power Nd:YAP laser at 1.34μm.

     

    CRYSTIK‘s LBO is featured by：

        ● High damage threshold;

        ● Spectral NCPM near 1300nm.

        ● Wide acceptance angle and small walk-off;

        ● High optical homogeneity (δn≈10-6/cm) and being free of inclusion;
        ● Relatively large effective SHG coefficient (about three times that of KDP);
        ● Type I and type II non-critical phase matching (NCPM) in a wide wavelength range;

        ● Broad transparency range from 160nm to 2600nm ; (SHG range from 55nm to 2600nm)

     

    CRYSTIK offers：

        ● Strict quality control;

        ● Free Technical Support.
        ●  Large crystal size up to 35x35x30mm3 and maximum length of 60mm;
        ● AR-coating, mounts and re-polishing services;
        ● A large quantity of  crystals in stock;
        ●  Fast delivery(2 weeks for polished only, 3 weeks for coated).

  • Dimension Tolerance

    W(+/-0.1)*H(+/-0.1)*L(+0.5/-0.1)mm

    Angle Tolerance

    +/-0.25°

    Perpendicularity

    ≤ 10’

    Scratch/Dig

    10/5

    Chamfer

    ≤ 0.2mm x 45°

    Parallelism

    ≤10″

    Chips

    ≤ 0.1mm

    Flatness

    λ/8@633nm

    Clear Aperture

    ≥ 90%

    Wavefront distortion

    λ/8@633nm

    Coatings

    C1---   AR/AR@1064(R<0.2%)&532(R<0.5%)

    C2---   AR/AR@1064(R<0.2%)&532(R<0.5%)&355(R<0.5%)

    Damage Threshold

    1GW/cm² (1064nm, 10ns, 10Hz)



  • 图片3.png

    Chemical and Structural properties


    Crystal Structure

    Orthorhombic, Space group Pna21, Point group mm2

    Lattice Parameter

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

    Melting Point   

    About 834℃

    Mohs Hardness   

    6

    Density         

    2.47 g/cm3

    Thermal Conductivity  

    3.5W/m/K

    Thermal Expansion Coefficient

    ax=10.8x10-5/K, ay= -8.8x10-5/K, az=3.4x10-5/K


    Optical and Nonlinear Optical Properties 


    Transparency Range

    160-2600nm

    SHG Phase Matchable Range

    551 ~ 2600nm  (Type I)      790-2150nm (Type II)

    Therm-optic Coefficient

    (°C, l in μm)

    dnx/dT=-9.3X10-6
    dny/dT=-13.6X10-6
    dnz/dT=(-6.3-2.1l)X10-6

    Absorption  Coefficient

    <0.01%/cm at 1064nm    <0.3%/cm at 532nm

    Angle Acceptance

    6.54mrad-cm    (φ, Type I,1064 SHG)
    15.27mrad-cm    (q, Type II,1064 SHG)

    Temperature Acceptance

    4.7°C-cm   (Type I, 1064 SHG)
    7.5°C-cm   (Type II,1064 SHG)

    Spectral Acceptance

    1.0nm-cm (Type I, 1064 SHG)
    1.3nm-cm (Type II,1064 SHG)

    Walk-off Angle

    0.60° (Type I  1064 SHG)
    0.12° (Type II  1064 SHG)

    NLO Coefficient

    deff(I)=d32cosφ      (Type I  in XY plane)
    deff(I)=d31cos2θ+d32sin2θ   (Type I  in XZ plane)
    deff(II)=d31cosθ  (Type II in YZ plane)
    deff(II)=d31cos2θ+d32sin2θ   (Type II in XZ plane)

    Non-vanished NLO susceptibilities

    d31=1.05 ± 0.09 pm/V
    d32= -0.98 ± 0.09 pm/V
    d33=0.05 ± 0.006 pm/V

    Sellmeier  Equations(λ in μm)     

    nx2=2.454140+0.011249/(λ2-0.011350)-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)-0.017968λ2-2.26x10-4λ4

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