Analyse
Des modulations temporelles importantes sont observées lors de la propagation d’impulsions lumineuses courtes (durée de l’ordre de la nanoseconde) dans une fibre optique monomode faiblement biréfringente. Ces modulations sont en relation avec l’intensité et la polarisation de l’onde incidente. Les auteurs montrent que le phénomène peut apparaître à bas niveau d’intensité et pour des fibres courtes. La représentation sphérique de Poincaré des états de polarisation permet d’illustrer simplement les effets linéaires et non linéaires en jeu.
Abstract
The authors report the existence of large modulations in the signal transmitted by a monomode and weakly biréfringent optical fiber. These modulations are related to the intensity and the polarization of the input light. They show that this phenomenon can occur at a weak intensity level and in short fiber lengths. They make use of the Poincaré sphere representation to illustrate all the implied linear and non linear effects.
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Bibliographie
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Macon, L., Botineau, J., Ding, K.X. et al. Transmission non linéaire dans les fibres optiques monomodes faiblement biréfringentes. Ann. Telecommun. 41, 44–49 (1986). https://doi.org/10.1007/BF02998269
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DOI: https://doi.org/10.1007/BF02998269
Mots clés
- Fibre optique
- Guide onde unimodal
- Propagation non linéaire
- Milieu biréfringent
- Effet Kerr
- Sphère Poincaré
- Impulsion optique
- Impulsion ultracourte
- Polarisation opaque
- Modulation optique