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BBO crystal
    BBO (Beta-Barium Borate or β-BaB2O4)is an outstanding nonlinear optical crystal which has the obvious and unique advantages on frequency conversions of high peak power laser radiation from UV to VIS. BBO is grown with the flux method. It is a negative uniaxial crystal, with ordinary refractive-index (no) larger than extraordinary refractive-index (ne).  Both type I and type II phase-matching can be reached by angle-tuning.
  • DETAIL
  • STANDARD PRODUCT
  • BASIC PROPERTIES

  • Applications:

         ● SHG, THG, 4HG, 5HG of Nd lasers

         ● SHG, THG, 4HG of Ti:Al2O3 and Alexandrite lasers

         ● SHG, THG and Frequency-mixing of Dye lasers

         ● SHG of Argon ion, Cu-vapor and Ruby lasers

         ● OPA and OPO

         ● Electro-Optical application (Pockels Cell)

     

     CRYSTIK‘s BBO is featured by：

         ● Broad phase-matching wavelength range from 409.6nm to 3500nm.

         ● Wide transmission region from 190 nm to 3500nm.

         ● Large effective SHG coefficient about 6 times greater than that of KDP crystal.

         ● High damage threshold of 10 GW/cm2 for 100 ps pulse-width at 1064nm.

         ● High optical homogeneity with ∆n ~ 10-6/cm.

         ● Good Mechanical and physical properties.

         ● Wide temperature-bandwidth of about 55°C.(For type I SHG 1064nm).

     

    CRYSTIK offers：

         ● Strict quality control;

         ● Free Technical Support.

         ● Crystal length from 0.005 mm to 25 mm and size up to 15x15x15 mm3; 

         ● P-coatings, AR-coatings,  mounts and re-polishing services; 

         ● A large quantity of crystals in stock;
         ● Fast delivery (2 weeks for polished only, 3 weeks for coated).

  • Standard product


    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@532(R<0.2%)&266(R<0.5%)

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

    C3---   Pcoating/Pcoating

    Damage Threshold

    1GW/cm² (1064nm, 10ns, 10Hz)

    Property

    图片1.png

  • Physical properties:


    Crystal Structure:

    Trigonal, space group R3c

    Lattics Parameters:

    a=b=12.532Å, c=12.717Å, Z=6

    Melting point

    About 1095℃

    Mohs Hardness

    4

    Density

    3.85g/cm3

    Thermal Conductivity

    1.2W/m/K(┴c): 1.6W/m/K(//c)

    Thermal Expansion Coefficients

    33=36x10-6/Ka11=4x10-6/K; 

    Optical Properties:


    Transparency Range:

    190-3500nm

    SHG Phase Matchable Range

    409.6-3500nm(Type I)  525-3500nm(Type II)

    therm-optic Coefficients(/℃)

    dno/dT=-16.6x10-6

    dne/dT=-9.3x10-6

    Absorption Coefficients

    <0.1%/cm at 1064nm         <1%/cm at 532nm

    Angle Acceptance

    0.8mrad-cm      (θ, Type I,1064 SHG)   
    1.27mrad-cm    (θ, Type II,1064 SHG)

    Temperature Acceptance

    55℃-cm

    Spectral Acceptance

    1.1nm-cm

    Walk-off Angle

    2.7°   (Type I 1064 SHG)
    3.2°  (Type II 1064 SHG)

    NLO Coefficients

    deff (I)=d31sinθ+(d11cosΦ-d22sin3Φ)cosθ
    deff (II)=(d11sin3Φ+d22cos3Φ)cos2θ

    Non-vanished NLO susceptibilities

    d11=5.8xd36(KDP)
    d31=0.05xd11
    d22<0.05xd11

    sellmeier Equations(λ in μm )

    no2=2.7359+0.01878 / (λ2-0.01822) -0.01354 λ2
    ne2=2.3753+0.01224 / (λ2-0.01667) -0.01516 λ2

    Electro-optic coefficients:

    r22=2.7pm/V

    Half-wave voltage:

    7KV (at 1064nm,3*3*20mm3)

    Resistivity:

    >1011 ohm-cm

    Relative Dielectric Constant:

    εs11/εo:6.7
    εs33/εo:8.1
    Tan δ<0.001

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