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BIBO - Bismuth Trborate
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BIBO - Bismuth Trborate
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- Description
- Cas'Tech Class
- Parameters
-
Introduction
Bismuth Triborate (BiB3O6 or BIBO) is a newly developed nonlinear optical crystal. It possesses large effective nonlinear coefficient, high damage threshold and inertness with respect to moisture. Its nonlinear coefficient is 3.5-4 times higher than that of LBO, 1.5-2 times higher than that of BBO. It is a promising doubling crystal to produce blue laser. The top-seeded solution growth (TSSG) technique is used at CASTECH for the growth of BIBO single crystals.
CASTECH offers
- Strict quality control;
- Large crystal size up to 10 × 10 × 15 mm3;
- AR-coating mounts and re-working services;
- A large quantity of crystals in stock;
- Fast delivery (15 days for polished only, 20 days for AR-coated).
Basic Properties
Table 1. Chemical and Structural Properties
Crystal Structure
Monoclinic, Point group C2-2
Lattice Parameter
a = 7.116 Å, b = 4.993 Å, c = 6.508 Å, β = 105.62°, Z = 2
Melting Point
726 ℃
Mohs Hardness
5-5.5 Mohs
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
Table 2. Optical and Nonlinear Optical Properties
Transparency Range
286 - 2500 nm
Absorption Coefficients
< 0.1%/cm at 1064 nm
Physical Axis
X∥b, (Z, a) = 31.6°, (Y, c) = 47.2°
SHG of 1064/532 nm
Phase matching angle
168.9 ° from Z axis in YZ plane
Deff
3.0 ± 0.1 pm/V
Angular acceptance
2.32 mrad·cm
Walk-off angle
25.6 mrad
Temperature acceptance
2.17 ℃·cm
Sellmeier coefficients
n2i (λ) = A + B / (λ2 - C) - D λ2 (λ in µm)
A
B
C
D
n1
3.6545 (4)
0.0511 (2)
0.0371 (3)
0.0226 (1)
n2
3.0740 (3)
0.0323 (1)
0.0316 (3)
0.01337 (6)
n3
3.1685 (3)
0.0373 (1)
0.0346 (3)
0.01750 (8)
BIBO's Parameters
Table 3. Specifications
Dimension Tolerance
(W ± 0.1 mm) × (H ± 0.1 mm) × (L + 0.5/-0.1 mm) (L≧2.5 mm)
(W ± 0.1 mm) × (H ± 0. 1 mm ) × (L + 0.1/-0.1 mm) (L＜2.5 mm)
Clear Aperture
Central 90% of the diameter
Surface Quality (Scratch/Dig)
10/5 to MIL-PRF-13830B
Flatness
≦λ/8 @633 nm
Transmitted Wavefront Distortion
≦λ/8 @633 nm
Parallelism
20 arc sec
Perpendicularity
≦15 arc min
Angle Tolerance
Δθ≦0.25 °, ΔФ≦0.25 °
Chamfer
≦0.2 mm × 45°
Chip
≦0.1 mm
Damage Threshold
＞0.3 GW/cm2 @1064 nm, 10 ns, 10 Hz (AR-Coated)
Quality Warranty Period
One year under proper use.
Coatings
- Dual or triple band AR-coatings of BIBO for SHG and THG applications Broad
- Band AR-coating (BBAR) and P-coating of BIBO for OPO applications
- Low reflectance
- Long durability
- Other coatings are available upon request
Key words:- Nonlinear crystal
- BIBO
- large nonlinear coefficient
- frequency doubling
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