Transparent glass-ceramics based on
fluoride, chalcogenide and oxyfluoride
doped with rare-earth ions have been
successfully used for wavelength upconversion
devices for europium-doped
waveguide amplifiers. Transparent
mullite-, spinel-, willemite-, ghaniteand
gelenite-based glass-ceramics
doped with transition-metal ions have
been developed for use in tunable and
infrared lasers, solar collectors and
high-temperature lamp applications.
Glass-ceramics that exhibit second harmonic
generation and materials with
high Kerr constant for electrooptical
devices have been developed as well.
The combination of several properties
is the hallmark for their success.39