• Stoichiometric lithium niobate crystals possess unique advantages over congruent LiNbO₃.
• Precise control during the fabrication process results in a more uniform crystal structure and a higher Li⁺ molar ratio than in congruent lithium niobate.
• This precise stoichiometry reduces lattice defects, improves the symmetry of the crystal structure, and enhances the consistency and predictability of its optical rotatory power.
• In terms of optical performance, stoichiometric lithium niobate exhibits a lower absorption coefficient, minimizing energy loss as light passes through the material and ensuring higher optical transmittance.
• This characteristic makes it particularly suitable for applications with strict energy loss requirements, such as laser systems.
• Furthermore, its uniform crystal structure and low density of lattice defects reduce the effects of optical quantum scattering, improving the clarity and stability of optical signals.
• In the field of nonlinear optics, the superior and stable nonlinear optical properties of stoichiometric lithium niobate enable excellent performance in devices such as optical parametric amplifiers and oscillators.
• Its higher second-order nonlinear coefficient increases the efficiency of second- and third-harmonic generation, making it ideal for frequency doubling and mixing applications.
• In addition, compared with congruent lithium niobate, stoichiometric lithium niobate shows stronger resistance to depolarization, prolonging the service life of the crystal and ensuring long-term stability.
• Its excellent thermal stability, achieved by conforming to the theoretical chemical composition, renders it suitable for applications demanding high stability, such as high-power laser systems.