BIBO

Bismuth triborate(BiB3O6) has a large effective nonlinear optical coefficient, high damage threshold, and is not easily deliquescent. Its nonlinear optical coefficient is approximately 3.5-4 times that of LBO and 1.5-2 times that of BBO, making it an excellent frequency doubling crystal for generating blue light.

Classification:

Nonlinear Crystals

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Detailed introduction

Bismuth triborate(BiB₃O₆) has a large effective nonlinear optical coefficient, high damage threshold, and is not easily deliquescent. Its nonlinear optical coefficient is approximately 3.5-4 times that of LBO and 1.5-2 times that of BBO, making it an excellent frequency doubling crystal for generating blue light. In particular, BIBO exhibits extremely high efficiency in frequency doubling applications from 946 nm to 473 nm.

Product features

High nonlinear optical coefficient

Good optical homogeneity and mechanical strength

Wide transparency range

low loss

Excellent temperature stability

Relatively high damage threshold, suitable for ultrafast laser systems

Specifications
Dimensional Tolerance	(W±0.1 mm)×(H±0.1 mm)×(L±0.2 mm)
Angle Tolerance	Dq＜±0.3°, Df＜±0.3°
Parallelism	＜20″
Perpendicularity	＜5′
Clear Aperture	≥Central 95% of the diameter
Surface Quality	10/5(MIL-PRF-13830B)
Flatness	λ/8 @633nm
Wavefront Distortion	＜λ/8 @633nm

Crystal Chemistry and Structural Characteristics
Crystal structure	Orthorhombic
Lattice parameters	a=12.532Å, b=6.71Å, c=10.864Å
Melting point	1090℃
Mohs hardness	4.5
Density	3.85g/cm³
Thermal conductivity	10W/(m·K)
Thermal expansion coefficient	a:4.4×10^-6/K, b:3.5×10^-6/K, c:9.3×10^-6/K

Characteristic Parameters
Transmittance	＞95%(1064nm)
Optical uniformity	＜0.1%
Temperature stability	＜10-5/K
Nonlinear optical coefficient	d31=8.8, d32=3.5, d33=13.8
Thermal coefficient	dn/dT=10^-5/K
Refractive index	no=2.155, ne=2.220(1064nm)
Nonlinear Coefficien(pm/v)	3.5(SHG), 1.8(THG)
Effective SHG coefficient (SHG, THG)	1.7(SHG), 0.9(THG)
Walk-off Angle (mrad·cm)	32(type I), 42(type II)
Acceptance Angle (mrad·cm)	22.5(type I), 29.5(type II)
Phase Matching Range (℃m)	400~1300(SHG), 900~2600(THG)
Temperature Acceptance (℃)	55
Damage Threshold(GW/cm²)	~2.5(SHG), ~0.6(THG)