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Optica Publishing Group
  • Journal of the Optical Society of Korea
  • Vol. 1,
  • Issue 1,
  • pp. 10-14
  • (1997)

Energy transfer and photon avalanche in Tm3+:LaF3

Open Access Open Access

Abstract

Single pulse laser excitation at 656 nm and successive pulse excitation at 635.2 and 648.4 nm produced blue emission at 480 nm by two-step upconversion process in Tm/sup 3+/:LaF/sub 3/. The excited-state absorption cross-section of the /sup 3/F/sub 4/ to /sup 1/G/sub 4/ transition was estimated by a looping mechanism with cross-relaxation processes. The dynamics of up-conversion andthe possibility of the photon avalanche by a pulse laser excitation were studied by numerical simulation with the rate equation model.

© 1997 Optical Society of Korea

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