BBO Crystal
BBO CRYSTAL Manufacturing Capabilities
Parameter | Specs |
Angle tolerance: | Δθ< ± 0.5°; Δφ< ±0.5° |
Dimensional Tolerance: | (W ± 0.1mm) x (H ± 0.1mm) x (L + 0.2/-0.1mm) |
Flatness: | <L/8 at 633nm |
Surface Quality(S/D): | 10/5 before coating, 20/10 after coated |
Parallelism: | < 20 arc seconds |
Perpendicularity: | < 5 arc minutes |
Wavefront Distortion: | <L/8 at 632.8nm |
Clear Aperture: | Central 95% |
Bevel (leg width): | <0.15mm x 45degree |
Coating: | * Protective coating is required to prevent polished surfaces from fogging. |
* Anti-reflective coating should be considered if low reflectivity is required. | |
Mount: | Black Anodized Aluminium |
Properties of BBO Crystal:
Crystal Structure | trigonal, space group R3c |
Cell Parameters | a = b = 12.5322Ä, c = 12.7172Ä, 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 |
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) |
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); |
Transparency Range | 189 - 3500 nm |
Refractive Indices | ne = 1.5425, no = 1.6551 |
Therm-Optic Coefficients | dno/dT = - 9.3 x 10-6/℃ |
Sellmeier Equations:
no2(λ) = 2.7359+0.01878/(λ2-0.01822)-0.01354 λ2 | |
ne2(λ) = 2.3753+0.01224/(λ2-0.01667)-0.01516 λ2 |
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BBO optical properties |
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Transparence range | 189-3500nm |
Second harmonic generation (SHG) range | 410-2400nm |
Type I phase matching plane | X-Z plane, φ=0° |
Type I phase matching plane | X-Z plane, φ=30° |
The crystals with different angle cut for various applications are listed as follows:
1) Harmonic generations of Nd:YAG lasers:
1064nm SHG --> 532nm | 4x4x7mm Type I , θ=22.8°, φ=0°; |
1064nm THG --> 355nm | 4x4x7mm Type I, θ=31.3°, φ=0°; Type II q=38.6°, φ=30° |
1064nm 4HG --> 266nm | 4x4x7mm Type I, θ=47.6°, φ=0°; |
1064nm 5HG --> 213nm | 4x4x7mm Type I, θ=51.1°, φ=0°; |
2) OPO and OPA pumped by harmonics of Nd | YAG lasers |
532nm Pump --> 680-2600nm | 8x6x12mm Type I, θ=21°, φ=0°; |
355nm Pump --> 410-2600nm | 8x6x12mm Type I, θ=30°, φ=0°; Type II, q=37°, φ=30°; |
266nm Pump --> 295-2600nm | 8x6x12mm Type I, θ=39°, φ=0°; |
3) Frequency doubling of dye lasers
670-530nm SHG --> 335-260nm | 8x4x7mm Type I, θ=40°, φ=0°; |
600-440nm SHG --> 300-220nm | 8x4x7mm Type I, θ=55°, φ=0°; |
444-410nm SHG --> 222-205nm | 8x4x7mm Type I, θ=80°, φ=0°; |
4) Harmonic generations of Ti:Sapphire lasers
700-1000nm SHG --> 350-500nm | 5x5x0.2mm Type I, θ=28°, φ=0°; |
700-1000nm THG --> 240-330nm | 5x5x0.2mm Type I, θ=42°, φ=0°; |
700-1000nm FHG --> 210-240nm | 5x5x0.2mm Type I, θ=66°, φ=0°; |
5) Frequency doubling and tripling of alexandrite lasers
720-800nm SHG --> 360-400nm | 6x4x7mm Type I, θ=31°, φ=0°; |
720-800nm THG --> 240-265nm | 6x4x7mm Type I, θ=48°, φ=0°; |
6) Intracavity SHG of Ar+ laser with brewster angle cut BBO Crystal
514nm SHG --> 257nm | 4x4x7mm Type I, θ=51°, φ=0°, B-cut; |
488nm SHG --> 244nm | 4x4x7mm Type I, θ=55°, φ=0°, B-cut; |
Mounting: In order to prevent crystals from damaging or to be easily operated, CryLight provide three kinds of mount of holder to install different dimension crystals. Please contact our sales for more information.
Part No. | Size(mm) | Type | θ | φ | Coating |
BBO001 | 4x4x7 | I | 22.8° | 0° | AR/AR@1064&532nm |
BBO002 | 4x4x7 | I | 47.6° | 0° | AR/AR@532&266nm |
BBO003 | 4x4x10 | I | 22.8° | 0° | AR/AR@1064&532nm |
BBO004 | 4x4x10 | I | 47.6° | 0° | AR/AR@532&266nm |
BBO005 | 5x5x2 | I | 29.2° | 0° | AR/AR@800&400nm |
BBO006 | 5x5x1 | I | 29.2° | 0° | AR/AR@800&400nm |
BBO007 | 5x5x0.3-0.5 | I | 29.2° | 0° | AR/AR@800&400nm |
BBO008 | 5x5x0.1 | I | 29.2° | 0° | AR/AR@800&400nm |
CRYLIGHT'S production lines of crystal
Grinding
Polishing
Polishing
Coating
Spectrophotometer
Inspection
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