• alpha-BBO
  • Calcite
  • Cr4+YAG
  • Fluoride
  • Sapphire
  • TeO2
  • TGG
  • YAG
  • YVO4
  • alpha-BBO

    α-BBO(High Temperature form Barium Borate) crystal has large birefringence over 189-3500nm. All the properties of α-BBO are similar with β-BBOexcept for to be used in nonlinear optics due to its centric symmetry crystal structure. But α-BBO is an excellent birefringent crystal that would be used instead of Calcite, TiO2or LiNbO3, especially for high power and UV polarizers because of its deep UV transparency, good mechanical properties and high laser damage threshold. 

    Chemical formula:α-BaB2O4

    Transparency Range: 189-3500nm

    Mohs hardness:4.5

    Melting Point: 1095oC

    Density: 3.85 gram/cm³

    Optical Homogeneity Δn <10-6/cm

    Hygroscopic Susceptibility: Low

    Damage Threshold: 1GW/cm²@ 1064nm, 500MW/cm²@ 355nm

    Refractive Indices, Birefringence (Δn=ne-no)& Walk-off Angle @ 45º(ρ):
    @ 266nm no=1.7617, ne=1.6114, Δn=-0.089805, ρ=-5.6926º

    @ 532nm no=1.6776, ne=1.5534, Δn=-0.075491, ρ=-5.0407º

    @ 1064nm no=1.6579, ne=1.5379, Δn=-0.073282, ρ=-4.9532º

    Sellmeier Equation(λ in μm):
    no2= 2.7359 + 0.01878/(λ2-0.01822)-0.01354λ2
    ne2= 2.3753 + 0.01224/(λ2-0.01667)-0.01516λ2


    Features and Standard specifications from LNG Optics:

    Orientation accuracy: ± 12 arc minutes

    Dimension tolerance: ± 0.2mm

    Surface Quality: 10/5 S/D

    Flatness: λ/8 @ 632.8nm

    Parallelism: 30 arc seconds

    Wedged angles accuracy: 3 arc minutes

    Perpendicularity: 5 arc minutes

    AR Coatings: single band, broadband

    Mount: Upon request