BBO Crystal
β-Barium borate (β-BaB2O4 or BBO) is a nonlinear optical crystal which has been widely used in non-linear optical applications like OPO, OPA, OPCPA and other. Due to its large spectral transmission range as well as phase matching, BBO crystals have been applied in second, third, fourth or fifth harmonic generations for high power visible/UV sources and optical parametric conversions for high power broadly tunable sources. Since its broad gain bandwidth overlaps with Ti:Sapphire in 800 nm range, ultra-high power and high contrast laser systems have been built based on the mixed CPA/OPCPA plan.
Wide transmission region from 190 nm to 3500nm
Large effective second-harmonic-generation(SHG)coefficient
Broad phase-matching range from 409.6 nm to 3500nm
Wide temperature-bandwidth of about 55℃
High damage threshold of 10 J/cm2 for 100 ps pulse-width at 1064 nm
High optical homogeneity with δn≈10-6/cm
Good mechanical and physical properties
Electro-optic crystal for Pockels cells Harmonic generations (up to fifth) of Nd doped lasers
Frequency doubling and tripling of ultrashort Frequency doubling of Argon ion Ti:Sapphire and Dye lasers and Copper vapour laser radiation
》More information about BBO Wikipedia
![]() High Purity raw materials >99.999% Low bulk absorption | ![]() Advanced raw material pre-sintering process No poly-crystalline defects |
![]() ① | ![]() ② | ![]() ③ |
① Full automatic controlled crystal growth furnace High yield
② Advanced CZ Method Crystalline Process Stable quality control
③ Systematic batch packing classification
》More information about Equipments
Maximum boule size >dia50mm | ![]() Absorption coefficient α<1%cm @1064nm |
BaO-B2O3 concentration increased by post-annealing process | ![]() High doping concentration gradient homogeneity , typical value<0.02cm-1/inch |
No bubbles, scatering point and inclusions in crystals | ![]() No grain boundary in crystals |
》More information about Crystal Growth
![]() High level dust-free clean room (1000) grade) | ![]() 2-sides polishing equipments |
![]() AFM | ![]() Interferometer |
Surface Flatness: <λ/8@632nm
Surface Quality: 10/5
》More information about Polishing
![]() S1,S2:AR/AR@1535-1540nm S1,AR@1535-1540nm,HR@940-980nm S1,AR@1535-1540nm |
》More information about Coating
Property | Value |
Chemical formula | BaB2O4 |
Crystal structure | trigonal, 3m |
Lattice Parameter | a=b=12.532Å,c=12.717Å, Z=6 |
Mass density | 3.85 g/cm3 |
Moh hardness | 4 |
Melting point | About 1095°C |
Thermal conductivity | 1.2 W/m/K (⊥c); 1.6 W/m/K (//c) |
Thermal expansion coefficient | α,4x10-6/K; c,36x10-6/K |
Birefringence | negative uniaxial |
Property | Value |
Transparency Range | 189 - 3500 nm |
Absorption Coefficient | α<0.1%/cm @1064nm |
Refractive Indices at 1.0642 μm at 0.5321 μm at 0.2660 μm | ne = 1.5425, no = 1.6551 ne = 1.5555, no = 1.6749 ne = 1.6146, no = 1.7571 |
Sellmeier Equations(λ in μm) | no2(λ) = 2.7359+0.01878/(λ2-0.01822)-0.01354λ2 ne2(λ) = 2.3753+0.01224/(λ2-0.01667)-0.01516λ2 |
Property | Value |
SHG Phase Matchable Range | 409.6 ∼ 3500nm (Type I); 525 ∼ 3500nm (TypeII) |
NLO coefficients | d11= 5.8 x d36(KDP); d31 = 0.05 x d11; d22< 0.05 x d11 deff(I)=d31sinϴ + (d11cos3φ - d22sin3φ)cosϴ deff(II)=(d11sin3φ+ d22cos3ϴ)cos2ϴ |
Therm-Optic Coefficients | dno/dT = - 9.3 x 10-6/◦C dne/dT = -16.6 x 10-6/◦C |
Electro-Optic Coefficients | g11= 2.7 pm/V, g22, g31< 0.1 g11 |
Half-Wave Voltage | 48 KV (at 1064 nm) |
Damage Threshold at 1.064 μm at 0.532 μm | 5 GW/cm2 (10 ns); 10 GW/cm2 (1.3 ns) 1 GW/cm2 (10 ns); 7 GW/cm2 (250 ps) |
Property | Value |
Orientation Tolerence | < 0.5° |
Thickness/Diameter Tolerance | ±0.05 mm |
Surface Flatness | <λ/8@632 nm |
Wavefront Distortion | <λ/4@632 nm |
Surface Quality | 10/5 |
Parallel | 30〞 |
Perpendicular | 15ˊ |
Clear Aperture | >90% |
Chamfer | <0.2×45° |
Crystal | Length/mm | Application | Orientation | PP Coatings S1/S2 nm/nm |
dimension/mm | Theta/Phi deg | |||
6 x 6 | 1 | SHG@800nm | 29.2/90 | 400 - 800 / 400 - 800 |
1 | THG@800nm | 44.3/90 | 400 - 800 / 266 | |
0.2 | SHG@800nm | 29.2/90 | 400 - 800 / 400 - 800 | |
0.5 | SHG@800nm | 29.2/90 | 400 - 800 / 400 - 800 | |
0.5 | THG@800nm | 44.3/90 | 400 - 800 / 266 | |
1.5 | SHG@1030nm | 23.4/90 | 515-1030 / 515 - 1030 | |
0.1 | THG@800nm | 44.3/90 | 400 - 800 / 266 | |
2 | SHG@800nm | 29.2/90 | 400 - 800 / 400 - 800 | |
0.5 | SHG@1030nm | 23.4/90 | 515-1030 / 515 - 1030 | |
1 | SHG@1030nm | 23.4/90 | 515-1030 / 515 - 1030 | |
2 | SHG@1030nm | 23.4/90 | 515-1030 / 515 - 1030 | |
0.1 | SHG@800nm | 29.2/90 | 400 - 800 / 400 - 800 | |
0.2 | THG@800nm | 44.3/90 | 400 - 800 / 266 | |
10 x 10 | 0.5 | SHG@800nm | 29.2/90 | 400 - 800 / 400 - 800 |
1 | SHG@800nm | 29.2/90 | 400 - 800 / 400 - 800 | |
0.2 | SHG@800nm | 29.2/90 | 400 - 800 / 400 - 800 | |
8 x 8 | 0.5 | SHG@1030nm | 23.4/90 | 515-1030 / 515 - 1030 |
1 | SHG@1030nm | 23.4/90 | 515-1030 / 515 - 1030 | |
1.5 | SHG@1030nm | 23.4/90 | 515-1030 / 515 - 1030 | |
2 | SHG@1030nm | 23.4/90 | 515-1030 / 515 - 1030 |
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OPO tuning curves of BBO (TypeII (eoe))with different pump light, namely 530 nm, 355 nm and 266 nm
OPO tuning curves of BBO (TypeII (eoe))with different pump light
History:
Metalaser has engaged in crystal industry over 20 years which is one section of Shanghai Daheng Optics and Fine Mechanics Co., Ltd held by SIOM.
Team:
More than 60% of our employees are physics or material scientists from NIALT and SIOM.
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