Rare-earth-doped fiber amplifier | Article about rare-earth-doped fiber amplifier by The Free Dictionary
rare-earth-doped fiber amplifier
rare-earth-doped fiber amplifier[¦rār ‚ərth ‚dōpt ‚fī·bər ′am·plə‚fī·ər]
An optical fiber amplifier whose fiber core is lightly doped with trivalent rare-earth ions, which absorb light at certain pump wavelengths and emit it at some signal wavelength through stimulated emission.
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Rare-earth-doped fiber amplifiers
amplify light while it is actually traveling in the fiber, which provides greater reliability, higher signal quality and increased cost-effectiveness than traditional SONET regenerators, which must receive the signal, electrically amplify it, and then retransmit it.