J. Phys. III France
Volume 5, Numéro 3, March 1995
Page(s) 297 - 306
DOI: 10.1051/jp3:1995126
J. Phys. III France 5 (1995) 297-306

850 nm Upconversion Lasing in $\mathsf{Er^{+3}}$ Doped Z.B.L.A. Fibers

A. Saissy, E. Maurice, G. Monnom, S. Staroske and G. Baxter

Laboratoire de Physique de la Matière Condensée, CNRS-U.A. 190, Université de Nice, Sophia Antipolis, Parc Valrose, 06108 Nice Cedex, France

(Received 25 April 1994, revised 1st September and 14 December 1994, accepted 19 December 1994)

Upconversion lasing at 850 nm is studied in Er +3 doped Z.B.L.A. fibers. Modelling of excited state absorption and upconversion emission from basic principles allows determining the laser oscillation condition in the fiber. Values of excited state absorption cross-sections are deduced from laser oscillation and spontaneous emission data and discussed.

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