Efficient violet upconversion signal from a fluoride fiber doped with erbium
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Updated: Jul 8, 2026

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Low-energy Cathodoluminescence for (Oxy)Nitride Phosphors
Published on: November 15, 2016
Optics Letters
|March 1, 1997
Abstract:
When an erbium-doped fluoride fiber was pumped with a red dye laser beam that resonantly excites the (4)F(9/2) state, we detected efficient violet upconversion emission from the (2)P(3/2) state that is much stronger than the green upconversion emission from the (4)S(3/2) state. Such unusual violet emission was found to be due to a three-photon excitation process.

