Optical materials like lithium tantalate (LiTaO3) and lithium niobate (LiNbO3) are valued for their piezoelectric, ferroelectric, and nonlinear optical properties. LiTaO3, with excellent thermal stability, is used in SAW devices, infrared detectors, and pyroelectric sensors, while LiNbO3, known for a strong electro-optic effect, is essential in optical modulators, waveguides, and frequency converters. Both are vital in photonics, telecommunications, and advanced sensing.