BIBO

BIBO
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BiB3O6(Bismuth Borate) is abbreviated as BIBO. It is a new type of nonlinear optical crystal. It not only has the following characteristics:

  • No deliquescence
  • Stable physical and chemical properties
  • High threshold of optical damage
  • Large bi-folding rate
  • Sensitive change of phase matching wavelength with angle

It has the outstanding advantage that the effective nonlinear coefficient deff can reach 3.32 pm/V, which is higher than the BBO and LBO crystals commonly used nowadays. Its conversion efficiency can reach nearly 70% in, 1064 nm out-of-cavity frequency doubling experiments. 

BIBO crystals can be used as high-efficiency frequency doubling and frequency summing devices and have broad application prospects in optical parametric oscillation (OPO).

Features of BiB3O6:

  • Stable physical and chemical properties
  • Moderate light transmission band
  • High frequency doubling conversion efficiency
  • The threshold of light damage resistance is large
  • The effective nonlinear optical coefficient is large
  • Not easy to deliquesce
  • Temperature receiving angle width
  • Good internal optical uniformity and less envelope

Physical and Chemical Properties

PropertyValue
Chemical Formula
BiB3O6
Crystal Structure
Monoclinic, point group 2
Density
5.033 g/cm3
Absorption Coefficient
<0.1%/cm @ 1064nm
Specific Heat Capacity
0.5J/g ·K @ 330K
Melting Point
726℃
Uniformity10-6/cm
Mohs Hardness
5.5
Hygroscopicity
Weak
Damage Threshold
500 MW/cm2 @ 1064nm, 10ns
Thermal Expansion Coefficient of Spindle-26.4 x 10-6/°C
50.4 x 10-6/°C
8.5 x 10-6/°C
Lattice Constant
a=7.116Å
b=4.993Å
c=6.508Å
β=105.62°
Z=2
 Anisotropy
Refractive Index
1079.5nm：n1=1.9166  
539.75nm： n1=1.9260
1079.5nm：n2=1.7569  
539.75nm： n2=1.7874
1079.5nm：n3=1.7835  
539.75nm： n3=1.8190

Linear and Nonlinear Optical Properties

Transparency range
286- 2500 nm
Absorption Coefficient
<0.1%/cm @ 1064nm
Frequency Doubling(1064，532)Matching Angle: 168.9° from Z axis in YZ plane
Deff :  3.0 +/- 0.1 pm/V
Acceptance Angle:  2.32 mrad.cm
Walk-off angle :  25.6 mrad
Receiving temperature: 2.17° C.cm
Axial DirectionX∥b, (Z,a)=31.6°,(Y,c)=47.2°

Spectrum

Nonlinear crystal BIBO phase matching -CRYLINKNonlinear crystal BIBO nonlinear coefficient-CRYLINK
Phase matching curves of BIBO Type Ⅰ and Type ⅡThe effective nonlinear coefficient distribution of BIBO in Type Ⅰ frequency doubling

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