LGN Crystals
Simple description：
The lanthanum gallium niobium oxide (LGN, La3Ga5.5Nb0.5O14) crystal is a novel inorganic non-metal material with unique physical and chemical properties. It belongs to the trigonal crystal system and possesses a non-centrosymmetric crystal structure, which enables it to exhibit excellent performance in piezoelectric, electro-optic, and nonlinear optical applications.
Advantages：High Thermal Stability and Mechanical Strength, Excellent Piezoelectric Properties, Good Electro-optic Properties, Wide Transmission Band, Superior Nonlinear Optical Properties
Application fields：Piezoelectric Applications, Electro-optic Applications, Nonlinear Optical Applications
Simple description：
The lanthanum gallium niobium oxide (LGN, La3Ga5.5Nb0.5O14) crystal is a novel inorganic non-metal material with unique physical and chemical properties. It belongs to the trigonal crystal system and possesses a non-centrosymmetric crystal structure, which enables it to exhibit excellent performance in piezoelectric, electro-optic, and nonlinear optical applications.
Detailed Description：
In terms of piezoelectric properties, LGN crystals exhibit high piezoelectric constants and electromechanical coupling coefficients, making them promising candidates for piezoelectric sensors, piezoelectric actuators, and other related applications. Additionally, they possess good temperature stability and mechanical strength, allowing them to maintain stable performance under extreme conditions such as high temperature and high pressure.
Regarding electro-optic properties, LGN crystals have large electro-optic coefficients and low half-wave voltages, which render them potentially valuable for electro-optic modulators, electro-optic switches, and other related applications.
Furthermore, LGN crystals demonstrate unique advantages in the field of nonlinear optics. Studies have shown that they possess high nonlinear optical coefficients and a wide transmission band, which can be utilized for the fabrication of mid-infrared laser devices, optical parametric oscillators, and other related devices. These properties are of great significance for advancing the development of mid-infrared lasers.
Advantages：
- High Thermal Stability and Mechanical Strength: Lanthanum gallium niobium oxide (LGN) crystals maintain stable performance under extreme conditions such as high temperature and high pressure, demonstrating good thermal stability and mechanical strength.
- Excellent Piezoelectric Properties: These crystals possess high piezoelectric constants and electromechanical coupling coefficients, making them promising candidates for piezoelectric sensors, piezoelectric actuators, and other related applications.
- Good Electro-optic Properties: LGN crystals have large electro-optic coefficients and low half-wave voltages, suitable for the fabrication of electro-optic modulators, electro-optic switches, and other related devices.
- Wide Transmission Band: The transmission band of these crystals is relatively wide, enabling their use in the manufacture of mid-infrared laser devices, which is of great significance for advancing the development of mid-infrared lasers.
- Superior Nonlinear Optical Properties: LGN crystals exhibit high nonlinear optical coefficients, making them suitable for the fabrication of nonlinear optical devices such as optical parametric oscillators.
Application fields：
- Piezoelectric Applications: Due to their high piezoelectric coefficients, LGN crystals have significant application value in piezoelectric sensors, piezoelectric actuators, and other related fields. These devices can utilize the piezoelectric effect of the crystals to convert mechanical energy into electrical energy, or vice versa, thereby enabling the measurement, control, and driving of physical quantities.
- Electro-optic Applications: The superior electro-optic properties of LGN crystals, including large electro-optic coefficients and low half-wave voltages, make them potentially valuable for electro-optic modulators, electro-optic switches, and other related electro-optic devices. These devices can utilize the electro-optic effect of the crystals to realize modulation, switching, and amplification of optical signals.
- Nonlinear Optical Applications: LGN crystals exhibit high nonlinear optical coefficients, moderate birefringence, and a wide transmission range (0.3~7.04 μm). These properties make them suitable for use in mid-infrared laser devices, optical parametric oscillators, difference frequency lasers, and other nonlinear optical devices. These devices can utilize the nonlinear optical effects of the crystals to realize frequency conversion, amplification, and oscillation of optical signals.
Specifications：
| Parameter Name | Symbol | Value/Description |
| Crystal Name | – | Lanthanum Gallium Niobate (LGN) |
| Molecular Formula | – | La3Ga5.5Nb0.5O14 |
| Point Group | – | 32 Point Group |
| Relative Permittivity (ε11) | ε11 | 20.02 |
| Relative Permittivity (ε33) | ε33 | 76.76 |
| Piezoelectric Constant (d11) | d11 | 7.15 C/N |
| Piezoelectric Constant (d14) | d14 | -5.56 C/N |
| Crystal Size | – | ≥Φ76×80 (example value, actual size may vary depending on preparation conditions) |
