| Applications: | ◆Second, third, fourth and fifth harmonic generation of Nd:YAG and Nd:YLF laser | |||
| ◆Frequency-doubling, -tripling and -mixing of Dye lasers | ||||
| ◆Second, third and fourth harmonic generation of Ti:Sapphire and Alexandrite lasers | ||||
| ◆Optical parametric amplifier (OPA) and optical parametric oscillators (OPO) | ||||
| ◆Frequency-doubling of Argon ion, Cu-vapor and Ruby lasers | ||||
| ◆Research and development for advanced laser techniques, including all-solid state wide-tunable lasers, ultrafast pulse lasers, and DUV lasers. | ||||
| Features: | ◇Broad phase-matching range from 409.6 nm to 3500nm | |||
| ◇Wide transmission range from 190 nm to 3500nm | ||||
| ◇Large effective second-harmonic-generation (SHG) coefficient about 6 times greater than that of KDP crystal | ||||
| ◇High damage threshold of 10GW/cm2 for 100ps pulse-width at 1064nm | ||||
| ◇High optical homogeneity with δn≈10-6/cm | ||||
| ◇Wide temperature-bandwidth of about 55°C | ||||
| Main Specification | Material | β-BaB2O4 | ||
| Length/Thickness | 0.01 ~ 25mm | |||
| Phase matching angle θ and φ | Determined by different kinds of harmonic generation. | |||
| Phase matching type | Type I or Type II | |||
| Coating | P-coatings, AR-coatings and mounts | |||
| Angle tolerance | Δθ< ± 0.5°; Δφ< ±0.5° | |||
| Dimension tolerance | (W ± 0.1mm) × (H ± 0.1mm) × (L + 0.2mm/-0.1mm) | |||
| Flatness | λ/8 @ 633nm | |||
| Surface quality | 10/5 scratch/dig per MIL-O-13830A | |||
| Parallelism | <20 arc sec | |||
| Perpendicularity | 5 arc min | |||
| Wavefront distortion | < λ/8 @ 633nm | |||
| Clear aperture | > 90% central area | |||
| Physical Properties | 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 | |||
| Hardness | 4.5 Mohs | |||
| Density | 3.85 g/cm3 | |||
| Specific heat | 490 J/kg/°C | |||
| Absorption Coefficient | < 0.1%/cm (at 1064 nm) | |||
| Hygroscopic Susceptibility | Low | |||
| Resistivity | > 1011 ohm-cm | |||
| Relative Dielectric Constant | eT11/e0: 6.7, eT33/e0: 8.1 | |||
| Tan d, < 0.001 | ||||
| Thermal Expansion Coefficients | a, 4 x 10-6/K | |||
| (in the range of 25°C- 900°C) | c, 36 x 10-6/K | |||
| Thermal Conductivity | ^c, 1.2 W/m/K; ||c, 1.6 W/m/K | |||
| Thermal conductivity coefficients | ||||
| Linear Optical Properties | Transparency Range | 189 - 3500 nm | ||
| Refractive Indices | ne = 1.5425, no = 1.6551 @ 1064 nm | |||
| ne = 1.5555, no = 1.6749 @ 532 nm | ||||
| ne = 1.6146, no = 1.7571 @ 266 nm | ||||
| Therm-Optic Coefficients | dno/dT = - 9.3 x 10-6/°C | |||
| dne/dT = -16.6 x 10-6/°C | ||||
| Sellmeier Equations:/(λ in μm) | no2(l) = 2.7359+0.01878/(l2-0.01822)-0.01354 l2 | |||
| ne2(l) = 2.3753+0.01224/(l2-0.01667)-0.01516 l2 | ||||
| Nonlinear Optical Properties | Phase-matchable SHG range | 189 - 1750nm | ||
| NLO coefficients | d11 = 5.8 x d36(KDP) | |||
| d31 = 0.05 x d11 | ||||
| d22< 0.05 x d11 | ||||
| Electro-Optic Coefficients | a1 = 11 x 10-6 °C-1 | |||
| a2 = 9 x 10-6 °C-1 | ||||
| a3 = 0.6 x 10-6 °C-1 | ||||
| Half-Wave Voltage | 48 KV (at 1064 nm) | |||
| Damage Threshold | 5 GW/cm2 (10 ns) @1064nm | |||
| 10 GW/cm2 (1.3 ns) @ 1064 nm | ||||
| 1 GW/cm2 (10 ns) @532 nm | ||||
| 7 GW/cm2 (250 ps) @ 532 nm | ||||
| Notice | ★BBO is hygroscopic. In application, protective coating or AR coating or crystal housing is usually recommended. | |||
| ★Engineers can select and design the best solution for you, if the main parameters of your laser are provided, such as energy per pulse, pulse width and repetition rate for a pulsed laser, power for a cw laser, laser beam diameter, mode condition, divergence, wavelength tuning range, etc. | ||||
