Knowra Erbium Erbium Erbium is a soft, silvery rare-earth metal with atomic number 68. Its ions absorb and emit light at wavelengths useful in optical communications and lasers.
Erbium-Doped Fiber Amplifier : An optical amplifier that uses erbium ions in glass fiber to boost signals near 1.55 micrometers. Erbium ions amplify signals in the low-loss wavelength band used by long-distance fiber networks.
Lanthanides : The 15 metallic elements from lanthanum to lutetium, characterized by filling of the 4f electron shell. Erbium is a lanthanide, and its 4f electrons shape its optical and magnetic behavior.
Periodic Table : A tabular arrangement of chemical elements ordered by atomic number and recurring chemical properties. Erbium’s position in period six and the lanthanide series identifies its chemical family.
Carl Gustaf Mosander : A Swedish chemist who discovered several rare-earth elements through mineral analysis in the nineteenth century. Mosander identified erbium-containing material while studying minerals from Ytterby.
Erbium Laser : A laser that uses erbium ions as its active medium, often emitting infrared light near 1.5 or 2.9 micrometers. Erbium’s emission wavelengths support telecommunications, medical procedures, and other laser applications.
4f Orbital : An atomic orbital type occupied by electrons in lanthanides and actinides. Erbium’s partly filled 4f shell creates its characteristic electronic transitions.
Rare-Earth Element : A collective name for the lanthanides, scandium, and yttrium, which share related chemical properties. Erbium is classified as a rare-earth element, a group often found together in ores.
Ytterby : A village on the Swedish island of Resarö whose quarry yielded minerals containing several rare-earth elements. The mineral that led to erbium’s identification came from Ytterby.
Er:YAG Laser : A solid-state laser using erbium-doped yttrium aluminum garnet, typically emitting light near 2.94 micrometers. Its strong water absorption makes this erbium laser useful for cutting or ablating tissue.
Photoluminescence : Light emission from a material after it absorbs photons. Erbium ions emit light after absorbing energy, the basis of their optical uses.
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