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Optica Publishing Group
  • Quantum Electronics and Laser Science Conference
  • OSA Technical Digest (Optica Publishing Group, 1991),
  • paper QWD35

Laser-excited luminescence in Dy3+-doped CaSO4 and CaF2

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Abstract

Optical excitation of a Dy3+-activated phosphor is difficult to achieve because the excitation through the f-d transition of Dy3+ ions requires photons of energy greater than 7 eV, which are not available from usual UV lamps or lasers. Also, because the oscillator strength of ff transitions is <10−6, a strong source of excitation is required to excite Dy3+ ions through ff transitions. We have observed Dy3+ emission in two host lattices, CaSO4 and CaF2 under 337-nm excitation from a nitrogen laser, through excitation of ff transitions.

© 1991 Optical Society of America

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