The BBO Crystal is an efficient NLO crystal for the second, third and fourth harmonic generation of Nd:YAG lasers, and the best NLO crystal for the fifth harmonic generation at 213 nm.
The BBO Crystal is an efficient NLO crystal for the second, third and fourth harmonic generation of Nd:YAG lasers, and the best NLO crystal for the fifth harmonic generation at 213 nm. Conversion efficiencies of more than 70% for SHG, 60% for THG and 50% for 4HG, and 200 mW output at 213 nm (5HG) have been obtained, respectively. BBO Crystal has the following.
Advantages of BBO Crystal
Broad phase-matching range from 409.6 nm to 3500 nm
Wide optical transmission from 190 nm to 3500 nm
Large effective second-harmonic-generation (SHG) coefficient
High damage threshold of 10 GW/cm2 for 100 ps pulse-width at 1064 nm
Wide temperature-bandwidth of about 55℃
Good mechinical and physical properties
01
02
03
04
05
PRODUCT PARAMETERS
Specifications of BBO Crystal | |
Angle tolerance: | Δθ< ± 0.5°; Δφ< ±0.5° |
Dimensional Tolerance: | (W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2mm/-0.1mm) |
Flatness: | <λ/8 at 633nm |
Surface Quality: | 10/5 S/D |
Parallelism: | < 20 arc seconds |
Perpendicularity: | < 5 arc minutes |
Wavefront Distortion: | <λ/8 at 632.8nm |
Clear Aperture: | Central 95% |
Chamfer: | 0.15x45° |
Coating: | * Protective coating is required to prevent polished surfaces from fogging. |
* Anti-reflective coating should be considered if low reflectivity is required. | |
Properties of BBO Crystal: | |
Crystal Structure | trigonal, space group R3c |
Cell Parameters | a = b = 12.532Ä, c = 12.717Ä, Z = 6 |
Melting Point | 1095 +/-5°C |
Transition Temperature | 925 +/-5°C |
Optical Homogeneity | Dn ≈10-6/cm |
Mohs Hardness | 4.5 |
Density | 3.85 g/cm3 |
Absorption Coefficient | < 0.1%/cm (at 1064 nm) |
Hygroscopic Susceptibility | low |
Resistivity | > 1011 ohm-cm |
Relative Dielectric Constant | εT11/ε0: 6.7, εT33/ε0: 8.1 |
Tan δ, < 0.001 | |
Thermal Expansion Coefficients(in the range of 25℃- 900℃) | a, 4 x 10-6/K |
c, 36 x 10-6/K | |
Thermal Conductivity | ^c, 1.2 W/m/K; ||c, 1.6 W/m/K |
Phase-matchable SHG range | 205nm-1750nm |
NLO coefficients | d11 = 5.8 x d36(KDP) |
d11 = 0.05 x d11, d22< 0.05 x d11 | |
Electro-Optic Coefficients | g11 = 2.7 pm/V, g22, g31< 0.1 g11 |
Half-Wave Voltage | 48 KV (at 1064 nm) |
Damage Threshold | 5 GW/cm2 (10 ns); |
at 1.064 mm | 10 GW/cm2 (1.3 ns)1 GW/cm2 (10 ns); |
at 0.532 mm | 7 GW/cm2 (250 ps) |
Transparency Range | 189 - 3500 nm |
Refractive Indices | |
at 1.0642 mm | ne = 1.5425, no = 1.6551 |
at 0.5321 mm | ne = 1.5555, no = 1.6749 |
at 0.2660 mm | ne = 1.6146, no = 1.7571 |
Therm-Optic Coefficients | dno/dT = - 9.3 x 10-6/℃ |
dne/dT = -16.6 x 10-6/℃ |
RECOMMENDED
The products cover the domestic market with its excellent quality and are exported to Europe, North America and other developed countries and developing countries in Southeast Asia, Africa, the Middle East and so on.