Used in solid-state lasers, particularly in combination with yttrium or other host materials, due to its ability to stabilize crystal structures and enhance luminescent properties. It serves as a dopant in scintillation materials for radiation detection, improving sensitivity and response time in gamma-ray detectors. Also employed in research for developing advanced optical coatings and waveguides, where high refractive index and thermal stability are required. Shows potential in quantum computing and telecommunications as part of rare-earth-doped photonic devices.