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Communication Dans Un Congrès Année : 2023

New polarisation-maintaining (PM) optical fibres for possible application in micro-endoscopy

Résumé

The ability to shape the refractive index of silica-based optical fibres is an important challenge to tackle for flexible engineering, in search of new applications and future optical fibre designs. The approach of stacking several hundred of capillaries of pure and doped silica to obtain fibres with a gradient index [1-2] has recently been demonstrated. This method, known as nanostructuring, is based on the Maxwell-Garnett approximation of effective media theory [3], because the size of each element in the fibre core decreases to the nanometric scale. It gives access to myriad structures with circular symmetry and enriched passive and active element-doped fibre designs. Nanostructuring also makes it possible to induce optical properties such as birefringence [4]. An approach of developing fully solid polarisation-maintaining (PM) fibres was established in the early 1980s and has not progressed significantly since. Commercially available PM fibres are based on stress-induced birefringence or core ellipticity, which represents a compromise between polarisation-maintaining functionality and compatibility (in terms of optical and mechanical properties) with telecommunications systems. However, PM fibres with stress-applied parts (SAPs) in the cladding are impractical for the creation of multi-core fibres, as SAPs can lead to much larger cladding diameters than for an optimal single-mode fibre. This is incompatible with the idea of multi-core fibres, where stacking/packaging of multiple cores in a minimal volume with negligible cross-coupling between cores is a crucial requirement. A new PM fibre concept is therefore needed to meet these PM-multi-core fibre demands. The scientific and technological objective of this project is to develop new multi-core polarisation-maintaining fibres without any stress application parts (SAPs), with an original structure based on an anisotropic pattern introduced at each core of the fibre. This enables the optical properties crucial to various applications to be freely shaped, for example in the field of micro-endoscopy or for the construction of multiparametric sensors. Such a design will make it possible to obtain multi-core fibres that meet the ever-growing demand for increased data transmission capacity.
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Dates et versions

hal-04390595 , version 1 (12-01-2024)

Identifiants

  • HAL Id : hal-04390595 , version 1

Citer

Monika Cieslikiewicz-Bouet, Alicja Anuszkiewicz, Andy Cassez, Adam Filipkowski, Géraud Bouwmans, et al.. New polarisation-maintaining (PM) optical fibres for possible application in micro-endoscopy. Women in Photonics, Leibniz Institute of Photonic Technology (Leibniz IPHT) in Jena, Germany, Nov 2023, Jena, Germany. ⟨hal-04390595⟩
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