Doped glass is a type of glass that has been infused with specific materials, known as dopants, to enhance its properties. These dopants can include metals or other compounds that alter the glass's optical, electrical, or thermal characteristics. Doped glass is commonly used in applications like lasers, where it can improve light emission and efficiency. One popular example of doped glass is neodymium-doped glass, which is used in laser technology. This type of glass can emit a specific wavelength of light when energized, making it valuable in various fields, including telecommunications and medical devices.