Bismuth Borate (BIBO) Crystals
Bismuth Borate (BIBO) is nonlinear crystal with large effective nonlinear coefficients when compared with LBO, BBO and KDP. It is mechanically robust, inert to moisture and as a high damage threshold.

BIBO strengths include:
  • Wide transmission range from 286 to 2,500nm
  • High optical homogeneity (dn ~ 10‾⁶)
  • Large effective nonlinear coefficients LBO (c.x3.8), BBO (c.x1.7) and KDP (c.x9)
  • High damage threshold
  • Wide temperature bandwidth

BIBO applications include:
  • SHG and THG using mid/high power Nd:YAG (1064m)
  • SHG and THG using high power Nd:YAG (1342 and 1319nm)
  • OPO and OPO applications
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BIBO Crystal - Availability
  • Format:
Rods, Discs and Slabs
  • Sizes:
Diameter: 25mm max and Length: 40mm max
BIBO Crystal Properties
Laser / Optical Properties Units Value
Transmission/
Transparency Range		 µm 0.286 - 2.50
Refractive Index (n) @1.06µm n₀ = 2.7010
ne = 2.6792
@5.3µm n₀ = 2.6134
ne = 2.5808
@10.6µm n₀ = 2.5912
ne = 2.5579
Non-linear Coefficient @10.6µm (d36) pm/V 43
Phase Matching Angle - Type I SHG@10.6µm º

@10.0µm		 55
Walk Off @5.3µm º 0.67
Absorption Coefficient @1.06µm cm‾¹ <0.02
@2.5µm cm‾¹ 0.01
@5.0µm cm‾¹ 0.01
@10µm cm‾¹ TBA
@11µm cm‾¹ TBA
Physical / Thermal Properties Units Value
Chemical Formula BiB3O6
Crystal Symmetry Monoclinic
Point Group 2
Melting Point ºC 726
Thermal Expansion Coeff. @20ºC 10‾⁶/ºC ┴ 23.4

║ -6.4
Thermal Conductivity Coeff. @20ºC W/m/ºK TBA
Specific Heat Capacity J/g K 0.5
Density g/cm³ 5.03
Mohs Hardness 5 - 5.5
Optical Damage Threshold @2.05/ºC,50ns MW/cm² 24/01/1900
BIBO Crystal - Sellmeier Equations
n₀²(λ) = 4.6453 + 2.2057/(1 - 0.1879/λ²) + 1.8577/(1 - 1600/λ²)

ne²(λ) = 5.2912 + 1.3970/(1 - 0.2845/λ²) + 1.9282/(1 - 1600/λ²)