HOME Products Nonlinear Crystals LBO Crystal

LBO Crystal

  Applications Optical parametric amplifiers(OPA) and oscillators(OPO)
    Frequency doubling(SHG) and tripling(THG)
    Diode laser pumped Nd:YAG and Nd: YLF laser. Alexandrite, Ti:Sapphire, Dye Lasers, Ultrashort Pulse Lasers
  Features Broad transparency range from 160nm to 2600nm
    High optical homogeneity (dn»10-6/cm) and being free of inclusion
    Relatively large effective SHG coefficient (about three times that of KDP)
    High damage threshold (18.9 GW/cm2 for a 1.3ns laser at 1053nm)
    Wide acceptance angle and small walk-off
    Type I and Type II non-critical phase matching (NCPM) in a wide wavelength range
    Spectral NCPM(non-critical phase matching ) near 1300nm
Main Specification Material  LiB3O5
Aperture up to 25 × 25 mm² Length up to 40 mm along X axis
Orientation accuracy of cut angle +/-0.5° (standard), +/-0.1° on request
Phase matching range SHG Phase Matchable Range
551 ~ 2600nm  (Type I) 790-2150nm (Type II)
Coating AR coatings dual band R < 0.1%
Angle tolerance Δθ< ± 0.5°; Δφ< ±0.5°
Dimension tolerance (W±0.1mm)×(H±0.1mm)×(L+0.5/-0.1mm) (L2.5mm)
(W±0.1mm)×(H±0.1mm)×(L+0.1/-0.1mm) (L<2.5mm)
Flatness λ/8 @ 633nm
Scratch/Dig code 10/5 Scracth/dig per MIL-O-13830A
Parallelism <10 arc sec
Perpendicularity < 5 arc min
Wavefront distortion < λ/8 @ 633nm
Clear aperture > 90% central area
Working temperature 25°C
Physical Properties Crystal Structure Orthorhombic, Space group Pna21, Point group mm2
Lattice parameters a=8.4473Å, b=7.3788Å , c=5.1395Å , Z=2
Melting Point 834°C
Hardness ~6 Mohs 
Density 2.474 g/cm3
Specific heat 1060
Absorption Coefficient <0.1%/cm at 1064nm
<0.3%/cm at 532nm
Hygroscopic Susceptibility Weak
Thermal Expansion Coefficients ax=10.8×10-5/K, ay= -8.6×10-5/K, az=3.4×10-5/K
(in the range of 25°C- 900°C)
Thermal Conductivity 35  mW.cm-1. °C-1
Linear Optical Properties Transparency Range 160 - 2600 nm
Refractive Indices
Therm-Optic Coefficients dno/dT = - 9.3 x 10-6/°C
dne/dT = -13.6 x 10-6/°C
dne/dT = (-6.3+2.1λ) x 10-6/°C
Sellmeier Equations nx2=2.454140+0.011249/(λ2-0.011350)-0.014591λ2-6.60x10-5λ4
(λ in μm)
Nonlinear Optical Properties Conversion efficient
Nonlinear coefficients d31 =  1.05 ± 0.09 pm/V
d32 = -0.98 ± 0.09 pm/V
d33=  0.05 ± 0.006 pm/V
Damage Threshold [GW/cm2 ]
 >10 for 1064nm, TEM00, 10ns, 10HZ (polished only)
>1 for 1064nm, TEM00, 10ns, 10HZ (AR-coated)
>0.5 for 532nm, TEM00, 10ns, 10HZ (AR-coated)
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)
Walk-off Angle 0.60° (Type I  1064 SHG)
0.12° (Type II  1064 SHG)
  Notice 1.png
LBO has a very low susceptibility to moisture. Users are advised to provide dry conditions for both the use  and preservation of LBO
    Polished surfaces of LBO requires precautions to prevent any damage
    Engineers can select and design the best solution for you, if the main parameters of your laser are  provided, such as energy per pulse, pulse width and repetition rate for a pulsed laser, power for a cw laser, laser beam diameter, mode condition, divergence, wavelength tuning range, etc.