Abstract

We present a static analysis of a general model for a bipolarized Nd-doped fibre laser including the slow longitudinal variations of the dynamical variables. Approximate analytical results are derived for the thresholds and the output intensities. A good agreement with the numerical simulations is achieved over a large range of parameters. The combined effects of pump-induced, distributed and localized dichroisms are studied versus the fibre length. In particular, the evolution of the thresholds versus the pump-input polarization angle, for different fibre lengths, is thoroughly investigated.

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