Erbium powder is primarily used in the production of specialty optical fibers and laser materials. It serves as a dopant in fiber amplifiers essential for long-distance telecommunications, enabling efficient signal transmission in the C-band wavelength range. The powder is also utilized in solid-state lasers for medical and dental procedures, including skin resurfacing and soft tissue surgery, due to its ability to emit infrared light at specific wavelengths. In addition, erbium powder finds application in upconversion materials used in infrared detection and display technologies. It is also employed in nuclear reactors as a neutron absorber in control rods, benefiting from its high neutron capture cross-section. Its unique luminescent properties make it valuable in manufacturing phosphors for energy-efficient lighting and display devices.