BBO BBO (Beta-Barium Borate or β-BaB2O4) is an excellent nonlinear crystal for frequency-doubling of Visible and Near IR laser light, OPO/OPG/OPA pumped by ultrafast pulses of wavelengths in the Near IR to UV, and sum-frequency mixing (SFM) into the Visible to the deep UV. BBO is one of the few practical crystals for use below 500 nm in SHG and SFM. ADVANTAGES ● Broad phase-matchable range from 409.6 nm to 3500nm ● Wide transmission region from 190 nm to 3500nm ● Large effective SHG coefficient ● High damage threshold ● High optical homogeneity with δn≈10-6/cm ● Wide temperature-bandwidth of about 55℃
Standard BBO
Dimension(mm) | θ(Deg) | φ(Deg) | Coating | Application |
4*4*7 | 22.8 | 0 | AR/AR@1064&532nm | SHG@1064, TypeⅠ |
4*4*7 | 47.6 | 0 | AR/AR@532&266nm | FHG@1064,TypeⅠ |
4*4*10 | 22.8 | 0 | AR/AR@1064&532nm | SHG@1064, TypeⅠ |
4*4*10 | 47.6 | 0 | AR/AR@532&266nm | FHG@1064, TypeⅠ |
5*5*1 | 29.2 | 0 | AR/AR@800&400nm | SHG@800, TypeⅠ |
5*5*0.3-0.5 | 29.2 | 0 | AR/AR@800&400nm | SHG@800, TypeⅠ |
Specifications
Material | BBO |
Match Type | type I or type II |
Dimension | W×H：1×1-15×15mm, L: 0.05-20mm |
Dimension Tolerance | W(±0.1) x (H(±0.1) x L(+0.2/-0.1)mm |
Angle Tolerance | Δθ< 0.2°, Δφ< 0.2° |
Flatness | λ/8 @ 633nm |
Wavefront Distortion | < λ/8 @ 633nm |
Scratch/Dig | 20/10@MIL-0-13830A |
Parallelism | < 30 arc seconds |
Perpendicularity | < 10 arc minutes |
Clear Aperture | >90% |
Chamfer | 0.15mmx 45° |
AR Coating | AR@ 1064nm R < 0.2% & 532nm R < 0.5% |
Damage Threshold | 500 MW/cm2@1064nm 10ns 10Hz |
Properties
Crystal Structure | trigonal, space group R3c |
Cell Parameters | a=b=12.532Å, c =12.717Å, Z=6 |
Melting point | 1095°C |
Mohs hardness | 4.5 |
Density | 3.85 g/cm3 |
Hygroscopic Susceptibility | low |
Thermal Conductivity | ⊥c: 1.2 W/m/K, ║c: 1.6 W/m/K |
Thermal Expansion Coefficients | α11= 4 x 10-6 /K, α33= 36 x 10-6 /K |
Resistivity (ohm • cm) | > 1011 ohm-cm |
Relative Dielectric Constant | εs11/ε0= 6.7 |
εs33/ε0= 8.1 | |
Tan δ<0.001 | |
Transparency Range | 190-3500 nm |
Phase Matching SHG Range | 205nm-1750nm |
Electro-optic coefficients | r22=2.7pm/V |
therm-optic Coefficients(/℃) | dno/dT=-16.6x10-6 |
dne/dT=-9.3x10-6 |
