Improvement of coupling tolerances of 850 nm single-mode optical links using self-aligned NIR photopolymerization
Résumé
Coupling VCSEL to optical fibers is a key step for their integration in optical interconnects or remote sensing systems, especially in the case of single mode devices. Many passive or active coupling methods were developed to improve VCSEL-fiber positioning precision and/or to increase alignment tolerances, using microlenses, V-grooves holders and/or polymer index matching layers. Nevertheless, alignment procedures remain tricky and time consuming. To address this issue, we recently developed a simple method to create a self-written waveguide between two single mode optical elements. The general principle of our process relies on the use of an innovative NIR photopolymer able to generate a gradient of refractive index under structured light irradiation and to build two waveguides that can merge even if their centers are not perfectly aligned .
Domaines
Physique [physics]| Origine | Fichiers produits par l'(les) auteur(s) |
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