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Nonlinear Crystals

  • Product Name: LBO
  • Dimension Tolerance:W x H (+/- 0.1mm) x L (+0.5/-0.1mm)
  • Angle Tolerance:Δθ ≤ 0.25°, Δφ ≤ 0.25°
  • Parallelism:< 20 arc seconds
  • Perpendicularity:< 5 arc minutes
  • Chamfer:0.1mm at 45°
  • Clear Aperture:90%
  • Scratch and Dig:10/5
  • Surface Flatness:λ/8 at 633nm
  • Wavefront Distortion:λ/8 at 633nm

Product overview

LBO or Lithium Triborate (LiB3O5) is an excellent nonlinear optical crystal. It has broad transparency range from 160nm to 2600nm, high optical homogeneity (dn > 10-6/cm), large effective SHG coefficient about three times greater than that of KDP crystal, and high damage threshold, good chemical and mechanical properties.

Scitlion is able to offer
Size upto 30 x 30 x 30mm
Length from 0.02mm to 60mm
Coating upon your request



2.47 g/cm3

Melting Point    


Mohs Hardness    


Thermal Conductivity   


Thermal Expansion 

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

Crystal Structure


Lattice Parameter

a=8.4473A, b=7.3788A , c=5.1395A 

Optical and Nonlinear Optical Properties

Transparency Range

160nm to 2600nm

SHG Phase Matchable Range

551nm to 2600nm  (Type I)      

790nm to 2150nm (Type II)

Thermal-optic Coefficient (λ in μm)

dnx/dT= -9.3 x 10-6/°C
dny/dT= -13.6 x 10-6/°C
dnz/dT= (-6.3-2.1λ) x 10-6/°C

Absorption  Coefficient

< 0.1% cm-1 at 1064nm    

< 0.3% cm-1 at 532nm

Angle Acceptance

6.54mrad cm-1    (φ, Type I,1064 SHG)
15.27mrad cm-1    (φ, Type II,1064 SHG)

Temperature Acceptance

4.7°C cm-1   (Type I, 1064 SHG)
7.5°C cm-1   (Type II,1064 SHG)

Spectral Acceptance

1.0nm cm-1 (Type I, 1064 SHG)
1.3nm cm-1 (Type II,1064 SHG)

Walk-off Angle 

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

NLO Coefficients

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) 


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)