Optogama, UAB (Lithuania): Optical equipment manufacturer
Please contact the import agency Taihei Boeki for details.
BBO crystals
BBO crystals
BBO (β-BaB₂O₄) crystals are nonlinear optical crystals with a wide transmission bandwidth from 188 nm to 5.2 µm and a broad phase matching range, making them suitable materials for a variety of wavelength conversion applications.
It is widely used for harmonic generation in pulsed Yb-doped lasers, second and third harmonic generation in Ti:Sapphire lasers, and broadband wavelength-tunable OPOs (optical parametric oscillators). In particular, it is one of the materials that exhibits the highest nonlinearity in the ultraviolet region and demonstrates excellent performance in generating short-wavelength light sources.
Main features
- A wide transmission bandwidth from 188 nm to 5.2 µm (transmission is also possible in the 3 to 5.2 µm region with thin crystals).
- A wide phase matching range capable of accommodating diverse quadratic nonlinear interactions across almost the entire transmission range.
- Wide temperature tolerance range (thermal tolerance)
- The crystal with the highest nonlinearity in the ultraviolet region.
- High laser damage threshold (LIDT)
- Ultra-thin crystals capable of handling ultrashort pulses of a few light cycles are available.
- Customization options are available for size, azimuth, coating, etc.
Application example
- Harmonic generation (up to 5th harmonics) of Nd-doped solid-state lasers.
- Ti: Frequency conversion (SHG/THG) for sapphire lasers, yellow-doped lasers, and dye lasers.
- Broadband tunable light source using Type I/Type II OPO (Optical Parametric Oscillator)
- Characterization of ultrashort pulse lasers (FROG, XFROG, SPIDER, Dispersion Scan, Chirp Scan)
Specification.
| Item | Message |
|---|---|
| Orientation accuracy | <30 arcmin |
| Effective opening | >90% |
| External dimensions tolerance | +0.0 / -0.1 mm |
| Parallelism error | <20 arcsec |
| Orthogonality error | <5 arcmin |
| Chamfering | <0.1 mm @45° |
| Surface quality | 10-5 SD |
| Wavefront distortion | <λ/8 @632.8 nm |
| coating | Low-dispersion protective coating or double-sided AR coating available. |
| Laser damage threshold (LIDT) | ＞500 MW/cm² @1064 nm, 10 ns |
| UVFS support | Crystals with a thickness of <0.1 mm are optically bonded to UV fused silica (0.5–1 mm). |
| mount | Compatible with φ25.4 mm black or natural aluminum mounts. |
Spectral, thermal, and mechanical properties
| Item | value |
|---|---|
| Chemical formula | β-BaB₂O₄ |
| Crystal structure | Rhombohedral crystal (3m) |
| Lattice constant | a = 12.532 Å, c = 12.717 Å |
| optical properties | Negative uniaxial crystal (no > ne) |
| density | 3.85 g / cm³ |
| Mohs scale | 4 to 4.5 |
| Transmission wavelength range | 188 nm to 5.2 µm (3 to 5.2 µm is also effective for thin plates) |
| Refractive index (@1064 nm) | no = 1.6551 / ne = 1.5426 |
| Selmeyer formula (no²) | 1 + 0.90291λ²/(λ²−0.003926) + 0.83155λ²/(λ²−0.018786) + 0.76536λ²/(λ²−60.01) |
| Selmeyer formula (ne²) | 1 + 1.151075λ²/(λ²−0.007142) + 0.21803λ²/(λ²−0.02259) + 0.656λ²/(λ²−263) |
technical support
Optogama provides support for selecting BBO crystals and performing theoretical calculations tailored to specific applications. Please contact us for optimal crystal design for your application.
standard product
| Size | thickness | θ | φ | coating | Use | Model number |
|---|---|---|---|---|---|---|
| 6 × 6 mm | 0.1 mm | 50° | 90° | P/P @515/257 nm | SHG @515 nm (50 fs, Type I) | 15808 |
| 6 × 6 mm | 0.15 mm | 50° | 90° | P/P @515/257 nm | SHG @515 nm (100 fs, Type I) | 15809 |
| 6 × 6 mm | 0.3 mm | 50° | 90° | P/P @515/257 nm | SHG @515 nm (200 fs, Type I) | 15810 |
| 6 × 6 mm | 0.05 mm | 29.2° | 90° | P/P @400–800 nm | SHG @800 nm (10 fs, Type I) | 15811 |
| 6 × 6 mm | 0.1 mm | 29.2° | 90° | P/P @400–800 nm | SHG @800 nm (20 fs, Type I) | 6399 |
| 6 × 6 mm | 0.2 mm | 29.2° | 90° | P/P @400–800 nm | SHG @800 nm (50 fs, Type I) | 15833 |
| 6 × 6 mm | 0.5 mm | 29.2° | 90° | P/P @400–800 nm | SHG @800 nm (100 fs, Type I) | 6398 |
| 6 × 6 mm | 1 mm | 29.2° | 90° | P/P @400–800 nm | SHG @800 nm (200 fs, Type I) | 6400 |
| 6 × 6 mm | 0.5 mm | 23.4° | 90° | AR/AR @515+1030 nm | SHG @1030 nm (50 fs, Type I) | 9447 |
| 6 × 6 mm | 1 mm | 23.4° | 90° | AR/AR @515+1030 nm | SHG @1030 nm (100 fs, Type I) | 9448 |
| 6 × 6 mm | 1.5 mm | 23.4° | 90° | AR/AR @515+1030 nm | SHG @1030 nm (150 fs, Type I) | 9449 |
| 6 × 6 mm | 2 mm | 23.4° | 90° | AR/AR @515+1030 nm | SHG @1030 nm (200 fs, Type I) | 10733 |
| 6 × 6 mm | 0.01 mm | 44.3° | 90° | P/P @400–800/266 nm | THG @800 nm (10 fs, Type I) | 15834 |
| 6 × 6 mm | 0.02 mm | 44.3° | 90° | P/P @400–800/266 nm | THG @800 nm (20 fs, Type I) | 15835 |
| 6 × 6 mm | 0.05 mm | 44.3° | 90° | P/P @400–800/266 nm | THG @800 nm (50 fs, Type I) | 15836 |
| 6 × 6 mm | 0.1 mm | 44.3° | 90° | P/P @400–800/266 nm | THG @800 nm (100 fs, Type I) | 9044 |
| 6 × 6 mm | 0.2 mm | 44.3° | 90° | P/P @400–800/266 nm | THG @800 nm (200 fs, Type I) | 15837 |
| 6 × 6 mm | 0.15 mm | 32.5° | 90° | AR/AR @515+1030/343 nm | THG @1030 nm (50 fs, Type I) | 9450 |
| 6 × 6 mm | 0.25 mm | 32.5° | 90° | AR/AR @515+1030/343 nm | THG @1030 nm (100 fs, Type I) | 9451 |
| 6 × 6 mm | 0.55 mm | 32.5° | 90° | AR/AR @515+1030/343 nm | THG @1030 nm (200 fs, Type I) | 9452 |
