Abstract

We report the study of absorption and fluorescence in neodymium doped silica fibers with excitation pulses much shorter than the fluorescence lifetime. Fluorescence and absorption saturation are observed for pump powers well below the damage threshold of the fiber. The saturation process is described using the density matrix method for the light absorption and the normal mode formalism for the propagation. The experimental results are in good agreement with the theory.

© 1989 Optical Society of America

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