Affordable Access

Publisher Website

Upconversion and relaxation of high lying states in rare-earth-doped ZBLAN bulk and fibers

Authors
Journal
Journal of Non-Crystalline Solids
0022-3093
Publisher
Elsevier
Publication Date
Volume
161
Identifiers
DOI: 10.1016/0022-3093(93)90708-6
Disciplines
  • Physics

Abstract

Abstract Upconversion pumping of fluorescence of Nd 3+-, Tm 3+- and Pr 3+-doped and Pr 3+-Yb 3+ co-doped samples of ZBLAN in bulk and fiber form was measured using cw and pulsed laser excitation. It is shown that single-laser-beam excited fluorescence is very sensitive to the resonance between the photon energy and an excited state transition frequency. Such resonance in the ESA mechanism can be associated with avalanche absorption in crystals and suggests the possibility of observing similar effects in these glasses, but it could be two-step absorption given the broad bands of glasses. It is concluded that the fiber configuration, as compared with bulk, is the best suited for achieving efficient upconversion lasers.

There are no comments yet on this publication. Be the first to share your thoughts.