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Coupleur optique variable

Tunable optical coupler

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Résumé

Deux prototypes de coupleurs variables 1×2 ont été réalisés à partir de fibres polymères (de 1 mm de diamètre) et de fibres en silice (200/300 µm). Ils ont une entrée et deux sorties, toutes situées dans le même plan bissecteur. Une optique à prisme mobile permet de faire varier les rapports de partage de puissance entre les deux voies de sortie.

Les performances de ces coupleurs en termes de pourcentage de partage de puissance entre les deux voies de sortie ont été évaluées aux longueurs d’onde de 633 nm et 850 nm. La variation continue des rapports de partage de puissance sur une large plage a été vérifiée expérimentalement.

De tels coupleurs sont utiles pour optimiser les commutations des dispositifs interfero-métriques.

Abstract

Two prototypes of 1×2 tunable couplers were produced starting from polymeric fibres (of diameter 1 mm) and of silica fibres (200/300 µm). They have an input and two output ports, all located in the same bisecting plan. An optics with mobile prism makes it possible to tune the power splitting ratios between the two output ports.

The performances of these couplers in terms of power splitting ratios between the two output ports were evaluated with the wavelengths of 633 nm and 850 nm. Experiments show large tuning ranges.

Such couplers are needed to optimize on-off ratios in interferometric devices.

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Nziengui Mabika, C., Moukila, H.S. Coupleur optique variable. Ann. Télécommun. 60, 1161–1168 (2005). https://doi.org/10.1007/BF03219841

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  • DOI: https://doi.org/10.1007/BF03219841

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