BBO nonlinear crystalsBeta Barium Borate ( β-BaB2O4 ),Website:http://www.meta-laser.com, or BBO, is one of the most usefulnonlinear optical crystal materials. Features:Broad optical transparency range (190 to 3500 nm)Large nonlinear coefficients (deff = 1.94 pm/V for Type I SHG of 1064 nm)High optical homogeneity (δn ~ 10-6)Large birefringence (no-ne= 0.115 @ 1064 nm) • Excellent resistance to thermal fractureHigh laser damage threshold (5 GW/cm2 @ 1064 nm with 10 ns pulses).Applications • Second-harmonic generation (SHG); • Third-harmonic generation (THG);Optical Parametric Oscillators ;Optical Parametric Amplifiers ;Frequency Conversion of Ultrafast Lasers ;E-O Modulators;Meta-Photonics BBOCrystals • Maximal Size: dia100mm   • Custom design production is availableSpecificationPolishing Specification for Laser GradeOrientation Tolerence< 0.5°Thickness/Diameter Tolerance±0.01 mmSurface Flatness<λ/8@632nmWavefront Distortion<λ/4@632nmSurface Quality10/5Parallel30〞Perpendicular15ˊClear Aperture>90%Chammfer<0.2×45°Standard products