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BiBO (Bismuth Borate, BiB3O6)
BiBO is a newly developed nonlinear optical crystal. It possesses large effective nonlinear coefficients (3.5 - 4 times higher than that of LBO, 1.5 -2 times higher than that of BBO ), high damage threshold and inertness with respect to moisture. It has been identified to be an efficient NLO crystal, especially for producing blue light through second harmonic generation of CW Nd lasers or ultrafast TiS lasers. |
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Lasertec's BIBO features
 Broad transparency range from 286nm to 2500nm
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High optical homogeneity (dn ~ 10-6/cm), free of inclusions |
Large effective SHG coefficient (about 9 times that of KDP) |
High damage threshold |
Wide temperature-bandwidth |
Inertness with respect to moisture |
Structural and Physical Properties
Crystal Structure |
Monoclinic, Point group 2 |
| Lattice Parameters
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a=7.116,b=4.993,c=6.508,b=105.6deg,Z=2 |
| Melting Point
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726C
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Mohs Hardness
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5-5.5
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Specific Heat |
0.5 J/gm-K at 330 K |
Thermal Expansion |
4.8x10-5[X], 4.4x10-6[Y],-2.69x10-5[Z] |
Density |
5.033 g/cm3 |
Long Term Stability |
Insensitive to moisture |
Optical Properties
| Transmission Range |
286- 2500 nm |
| NLO Coefficients |
d12=d14=2.3, d25=d36=2.4, d11=2.53,
d13=-1.3, d35=-0.9, d26=2.8 pm/V |
| Refractive Indices |
@539.75 nm: n1=1.9620, n2 = 1.7874, n3 = 1.8190
@1079.5 nm: n1= 1.9166, n2 = 1.7569, n3 = 1.7835 |
| Sellmeier Equations |
n12=3.6545+0.0511/(l2-0.0371)-0.0226l2
n22=3.0740+0.0323/(l2-0.0316)-0.01337l2
n32=3.1685+0.0373/(l2-0.0346)-0.01750l2 |
Application examples
| SHG and THG for middle and high power Nd: lasers at 1064nm |
| SHG and THG for high power Nd: lasers at 1342 &1319nm for red and blue laser |
| SHG for the Nd: Lasers at 914nm & 946nm for blue laser. Over 2.8W CW blue
@473nm was recently obtained from frequency doubling of 4.6W CW Nd:YAG
@ 946nm with BIBO |
| Optical Parametric Amplifiers (OPA) and Oscillators (OPO) applications |
Comparison of Nonlinear Optical Properties of Crystals for SHG @ 946nm
Crystals |
Length
(mm) |
Deff
(pm/V) |
Walk-off
(mrad) |
Output ower(W) |
Conversion Efficiency |
BIBO |
10.4 |
3.3 |
40.7 |
2.8 |
63% |
| LBO |
10 |
0.81 |
11.3 |
1.52 |
33% |
| BBO |
8 |
2.0 |
60.3 |
2.1 |
47% |
Standard Products
| Part No. |
Dimension |
Application |
Coating |
Type |
| BIBO2505 |
5x5x0.5mm |
SHG or THG |
AR coating |
I |
| BIBO2501 |
5x5x1mm |
SHG or THG |
AR coating |
I |
| BIBO2305 |
3x3x5mm |
SHG or THG |
AR coating |
I |
| BIBO2307 |
3x3x7mm |
SHG or THG |
AR coating |
I |
| BIBO2310 |
3x3x10mm |
SHG or THG |
AR coating |
I |
| BIBO2410 |
4x4x10mm |
SHG or THG |
AR coating |
I |
For crystals of other sizes and coatings ( P-coatings or BBAR coatings), please contact with us for details.
BiBO crystals as thin as 0.1 mm are available for highly efficient ultrafast applications.
Wavefront distortion: |
less than l/8 @ 633nm |
Dimension tolerance: |
(W+/-0.1mm) x (H+/-0.1mm) x (L + 0.2mm/-0.1mm) |
Clear aperture: |
> 90% central area |
Flatness: |
l/8 @ 633nm |
Scratch/Dig code: |
10/5 to MIL-O-13830A |
Parallelism: |
better than 20 arc seconds |
Perpendicularity: |
5 arc minutes |
Angle tolerance: |
Dq< +/-0.25, Df< +/-0.25 |
Coatings Anti-reflective coatings (AR-coatings): Single-band, dual-band AR-coatings and broad-band AR coatings on BiBO surfaces are available. For thin crystal,Lasertec can provide holder for you .blow is standard mounted
Hot Applications:
SHG in BiBO produces 2.8W of blue @ 473nm
BiBO used for efficient SHG of femtosecond pulses from Ti:S lasers to produce375-425nm in blue
990 mW average power, 52% efficient, high-repetition-rate 2.4 ps generation in the blue with BiBO crystal
BiBO crystals used for fs OPO pumped by 400nm for tunable visible light or fs OPA pumped by 800nm for tunable IR light |
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