Key Features
- High electro-optic coefficients
- Wide transparency range
- Low dielectric loss
- Excellent thermal stability
- High laser damage threshold
Description LGS (La₃Ga₅SiO₁₄, Langasite) is a multifunctional crystal known for its exceptional electro-optic, piezoelectric, and acousto-optic properties. Its excellent electro-optic performance makes it ideal for various applications, including Q-switching in lasers. The LGS electro-optic Q-switch operates through the Z-direction of the crystal and applies an electric field along the X-direction, enabling efficient transverse electro-optic modulation. This feature allows the LGS crystal to achieve Q-switching without the need for piezoelectric ringing, making it highly effective for high-power laser applications.
Compared to traditional DKDP electro-optic modulators, LGS (Langasite) crystals offer significant advantages such as lower absorption, higher laser damage resistance, and a broader transparency range (210-2000nm). These properties make LGS crystals suitable for use in high-power laser systems, ensuring stable and reliable performance.
Physical Properties
- Chemical Formula: La₃Ga₅SiO₁₄
- Density: 5.75 g/cm³
- Melting Point: 1470°C
- Transparency Range: 242-3200nm
Optical Properties
- Refractive Index: 1.89
- Electro-Optic Coefficients: γ41 = 1.8 pm/V, γ11 = 2.3 pm/V
- Dielectric Constant: ε/ε0 = 17 x 10¹⁰ Ω.cm
Standard Specifications
| Property | Specification |
|---|---|
| Chemical Formula | La₃Ga₅SiO₁₄ |
| Density | 5.75 g/cm³ |
| Melting Point | 1470°C |
| Transparency Range | 242-3200 nm |
| Refractive Index | 1.89 |
| Electro-Optic Coefficient | γ41 = 1.8 pm/V, γ11 = 2.3 pm/V |
| Dielectric Constant | ε/ε0 = 17 x 10¹⁰ Ω.cm |
| Thermal Expansion Coefficients | α11 = 5.15 x 10⁻⁶/K, α33 = 3.65 x 10⁻⁶/K |
Other Properties
- Thermal Conductivity: Low thermal expansion coefficients ensuring minimal thermal distortion
- Hardness: Comparable to quartz, making it durable for high-power applications
Applications
- Electro-optic Q-switching in lasers
- Acousto-optic devices
- Piezoelectric applications in high-stability oscillators
- Laser modulation and switching
- Used in the development of new laser materials, such as Tm, Ho, and Er doped crystals
Processing and Handling LGS crystals require careful handling during processing to maintain their exceptional electro-optic properties. Precision cutting, polishing, and coating are essential to achieve the desired specifications. At Shape Optics, we employ advanced fabrication techniques to ensure the highest quality and performance of LGS crystals.
Why Choose Shape Optics Shape Optics is a leading provider of high-quality LGS crystals, leveraging state-of-the-art manufacturing processes to deliver superior products. Our commitment to quality, innovation, and customer satisfaction sets us apart in the industry.
Shape Optics Strength and Capabilities Shape Optics offers a comprehensive range of LGS crystals, customized to meet specific application requirements. Our expertise in crystal growth, cutting, polishing, and coating ensures that we provide the highest performance materials for your needs. Partner with us to benefit from our extensive experience and dedication to excellence in the field of optical materials.
