Lithium niobate (LiNbO3) is a compound of niobium, lithium and oxygen, and it is a negative crystal (n0>ne). The deformed lithium niobate crystal is a material with multiple properties such as piezoelectric, ferroelectric, optoelectronic, nonlinear optics, and pyroelectric. Its single crystal is optical waveguide, mobile phone, piezoelectric sensor, optical modulator and various other materials. Important material for linear and nonlinear optical applications. It also has a photorefractive effect. Lithium niobate crystals are widely used in optical communications, information processing, integrated optical circuits, image storage, harmonic generation, frequency doubling devices, parametric oscillation, 1064nm laser frequency doubling, and quadruple frequency phase matching Devices and other aspects. Such as: SAW filter, Q-switch, electro-optical dimmer, parametric oscillator.
Doped with MgO: LN crystal, its damage resistance threshold is more than doubled than that of pure LN crystal.
| Main performance parameters | |||
| Crystal growth method | Czochralski method | ||
| Crystal structure | Tripartite | ||
| Lattice constant | a=b=5.148Å c=13.863 Å | ||
| Melting point（℃） | 1250 | ||
| Curie temperature | 1140℃ | ||
| Density（g/cm3） | 4.64 | ||
| Hardness | 5（mohs） | ||
| Spectral transmission wavelength | 0.4-2.9um | ||
| Refractive index | no=2.286 ne=2.203 （632.8nm） | ||
| Intensity of spontaneous polarization | 50×10C/cm' | ||
| Non-linear coefficient | d22 = 2.1 d31 = - 4.5 d33 = -0.27 （pmv-1） | ||
| Electro-optic coefficient | γ13=8.6，γ22=3.4，γ33=30.8，γ51=28.0，（pmv-1） | ||
| Optical damage threshold | 250 MW/cm2 @ 1064 nm, t ~ 10nsec. | ||
| Spectral transmission range Transmittance | 370～5000nm >68% （632.8nm） | ||
| Thermal expansion coefficient | //a, 2.0 x 10-6 / K | ||
| Absorption loss | @ 1064 nm < 0.1 %/cm | ||
| Product specifications | |||
| size | Anything equal to or less than Ø4″ | Surface Quality | 10/5 |
| Dimensional tolerance | Z axis: ±0.3mm | Flatness | v8 （632.8nm） |
| Chamfer | Less than 0.5mm, 45 º±5 º | Coating | R<0.2%（1064nm） |
| Crystal orientation accuracy | Z axis: 5′ | Wavefront distortion | <N4（633nm） |
| Parallelism | <10′ | Extinction Ratio | >400:1(633nm)φ6mm beam |
| Package | Class 100 clean bag, Class 1000 super clean room | ||
