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Lithium niobate LN is an inorganic substance with a chemical formula of LiNbO3. It is a negative crystal and a ferroelectric crystal . The polarized lithium niobate crystal has many properties such as piezoelectricity, ferroelectricity, photoelectricity, nonlinear optics, and thermoelectricity. High-performance materials with photorefractive effects at the same time. Lithium niobate crystal is a good piezoelectric transduction material, ferroelectric material
Product Description
Lithium niobate LN is an inorganic substance with a chemical formula of LiNbO3. It is a negative crystal and a ferroelectric crystal . The polarized lithium niobate crystal has many properties such as piezoelectricity, ferroelectricity, photoelectricity, nonlinear optics, and thermoelectricity. High-performance materials with photorefractive effects at the same time. Lithium niobate crystal is a good piezoelectric transduction material, ferroelectric material , electro-optic material , as an electro-optic material, it plays an optical modulation role in optical communication, and is widely used in parametric oscillators, frequency doubling, acousto-optic devices, and optical modulation device. The incorporation of MgO can effectively improve the anti-damage threshold of the crystal.
Main features
Curie temperature 1140±5℃ , high modulation bandwidth, stable physical and chemical properties.
Typical applications
SAW filters, isolators, narrowband filters, sensors, photonic tunable filters, acousto-optic devices, optical gyroscopes, optical waveguide optical switches, optical modulation directional couplers, optical communication modulators, interferometers , gyrator, high-speed long-distance communication devices and frequency multiplier devices, etc.
Product parameters
| Dimensions | 3", 4", 6", 8" Ingot and Wafer (SAW/Optical Grade) |
| doping | Undoped or dopable MgO |
| Crystal rod length | ≥50mm |
| Wafer Thickness | 0.25, 0.35, 0.50(mm) can be customized |
| Tangential | Y42°/Y36°/Y128°/X/Y/Z can be customized according to customer needs |
| surface treatment | Polished on one side, Polished on both sides |
| TTV | ＜ 5µm |
| Warpage | ≤40µm |
| Oriented Edge Width | 32.0±2.0mm can be customized |
| polished surface | Roughness Ra≤1nm |
| Chamfer | 0.1mm@45° or round edge |
Material properties
| Lattice parameters | a=0.515Å, c=13.863Å, Z=6Å |
| melting point | 125 0 ±5°C |
| Curie point | 1140±5℃ |
| Moh's hardness | 5 |
| density | 4.6 5 g/ cm3 |
| Deliquescence | not deliquescent |
| Dielectric constant | ε11/ε0=85; ε33/ε0=29.5 |
| Thermal expansion coefficient | a1=a2=2×10 -6 / ℃ , a3=2.2×10 -6 / ℃ @25 ℃ |
| Resistivity | 38 W/m/K @ 25 °C |
| Light transmission range | 370-5000nm |
| piezoelectric constant | d22=2.04×10-11 C /N, d33=0.6×10-11 C /N, d15=7×10-11 C /N, d31=-0.1×10-11 C /N |
| Electro-optic coefficient | gT33=32pm/V, gS33=31pm/V; gT31=10pm/V, gS31=8.6pm/VgT22=6.8pm/V, gS22=3.4pm/V |
| Refractive index | no=2.2827 ne=2.1928 @633nm |
