J. Phys. III France
Volume 6, Numéro 2, February 1996
Page(s) 323 - 330
DOI: 10.1051/jp3:1996125
J. Phys. III France 6 (1996) 323-330

Investigations on Excited-State Absorption in Pr 3+ Doped Fluorozirconate Fibers

A. Saissy, E. Maurice, G. Monnom and D.B. Ostrowsky

Laboratoire de Physique de la Matière Condensée, CNRS URA 190, Parc Valrose, 06108 Nice Cedex 2, France

(Received 4 July 1995, accepted 24 November 1995)

Excited state absorption (E.S.A.) in Pr 3+ doped fluorozirconate fibers pumped at 1012 nm is investigated by the pump-probe beam method. Probe wavelengths are successively 830, 780 and 1310 nm, we measure both the attenuation of the probe beam when 1012 nm pumping is applied and the modulation of the visible or 1.3  $\mu$m fluorescence when the probe is lauched into the fiber. Modelisation of these measurements allows us deducing the magnitude of E.S.A. cross-sections at 830, 780 and 1012 nm.

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