BIBO Crystal
WaveQuanta

BIBO (BiB3O6) Nonlinear Crystal for Blue and Green SHG, 286–2500 nm

WQ-NLC-BIBO
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Bismuth triborate (BiB3O6, BIBO) is a monoclinic nonlinear crystal. Its nonlinear coefficient is about 3.5–4 times that of LBO and 1.5–2 times that of BBO, and it is not affected by moisture. BIBO transmits from 286 nm to 2500 nm and is mainly used for frequency doubling of Nd lasers at 1064 nm, 946 nm and 914 nm, of 780 nm sources to 390 nm, and in OPOs and OPAs.

Key Features

  • Transparency range 286–2500 nm
  • Nonlinear coefficient about 3.5–4 times that of LBO and 1.5–2 times that of BBO
  • Effective SHG coefficient about 9 times that of KDP
  • deff = 3.0 ± 0.1 pm/V for 1064 nm SHG
  • Not hygroscopic (inert to moisture)
  • Absorption below 0.1%/cm at 1064 nm
  • Damage threshold above 0.3 GW/cm² at 1064 nm, 10 ns, 10 Hz

Typical Applications

  • SHG of medium- and high-power Nd lasers at 1064 nm
  • SHG of Nd lasers at 914 nm and 946 nm for blue output (e.g. 473 nm)
  • Frequency conversion of 1319 nm and 1342 nm Nd lasers for red and blue output
  • Frequency doubling of 780 nm lasers to 390 nm
  • Optical parametric oscillators (OPO) and amplifiers (OPA)

Standard Sizes

Size Cut / orientation Surface / coating Mount
5 × 5 × 1.5 mm θ = 149.8°, φ = 90° Blank —
5 × 5 × 0.5 mm θ = 154°, φ = 90° Polished, uncoated —
5 × 5 × 0.5 mm θ = 143.7°, φ = 90° S1: P-coated @ 1030 + 515 nm; S2: P-coated @ 343 nm Mounted
5 × 5 × 0.5 mm θ = 143.7°, φ = 90° S1: P-coated @ 1030 + 515 nm; S2: P-coated @ 343 nm —
5 × 5 × 3 mm θ = 42°, φ = 0° S1/S2: P-coated, minimum reflection over 750–2700 nm —
5 × 3 × 2 mm θ = 42°, φ = 0° S1/S2: P-coated, minimum reflection over 750–2700 nm —

Availability of individual sizes changes; custom sizes, cut angles and coatings are available on request.

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Browse all: Visible and NIR Nonlinear Crystals · Nonlinear Crystals

Model: WQ-NLC-BIBO · Custom sizes, orientations and coatings on request — contact WaveQuanta for a quote and lead time.

Chemical Formula BiB3O6
Crystal Structure Monoclinic, point group 2
Lattice Parameters a = 7.116 Å, b = 4.993 Å, c = 6.508 Å, β = 105.62°, Z = 2
Melting Point 726 °C
Mohs Hardness 5–5.5
Density 5.033 g/cm³
Thermal Expansion Coefficients αa = 4.8 × 10⁻⁵ /K, αb = 4.4 × 10⁻⁶ /K, αc = −2.69 × 10⁻⁵ /K
Hygroscopic Susceptibility None (inert to moisture)
Transparency Range 286–2500 nm
Absorption Coefficient < 0.1%/cm at 1064 nm
Physical Axes X ∥ b, (Z, a) = 31.6°, (Y, c) = 47.2°
Phase-Matching Angle (1064 nm SHG) 168.9° from Z axis in the YZ plane
Effective Nonlinear Coefficient (1064 nm SHG) deff = 3.0 ± 0.1 pm/V
Angular Acceptance (1064 nm SHG) 2.32 mrad·cm
Walk-off Angle (1064 nm SHG) 25.6 mrad
Temperature Acceptance (1064 nm SHG) 2.17 °C·cm
Dimension Tolerance (W ± 0.1 mm) × (H ± 0.1 mm) × (L +0.5/−0.1 mm) for L ≥ 2.5 mm; (W ± 0.1 mm) × (H ± 0.1 mm) × (L ± 0.1 mm) for L < 2.5 mm
Clear Aperture Central 90% of the diameter
Flatness < λ/8 @ 633 nm
Transmitted Wavefront Distortion < λ/8 @ 633 nm
Scratch/Dig 10/5 per MIL-PRF-13830B
Parallelism Better than 20 arcsec
Perpendicularity ≤ 5 arcmin
Chamfer / Chip ≤ 0.2 mm × 45° / ≤ 0.1 mm
Angle Tolerance Δθ ≤ 0.25°, Δφ ≤ 0.25°
Damage Threshold > 0.3 GW/cm² at 1064 nm, TEM00, 10 ns, 10 Hz
Specification Sheet PDF — Download
No CAD drawings available for this product.

Product Family: Visible and NIR Nonlinear Crystals (3 variants)

Product ▴▾ SKU Size ▴▾ Clear Aperture ▴▾ Operating Wavelength ▴▾
KTP (KTiOPO4) Nonlinear Crystal for 1064 nm SHG and E-O Devices, 350–4500 nm WQ-NLC-KTP — — —Contact
LBO (LiB3O5) Nonlinear Crystal for High-Power SHG and THG, 160–2600 nm WQ-NLC-LBO — — —Contact
BIBO (BiB3O6) Nonlinear Crystal for Blue and Green SHG, 286–2500 nm Current WQ-NLC-BIBO — — —