Graded-index polymer optical fibre and the fabrication thereof
US12298553B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 31, 2022 |
| Grant date | May 13, 2025 |
| Priority date | — |
| Expiry date | Mar 31, 2042 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/03633
- WIPO fieldOptics
- WIPO sectorInstruments
Abstract
A method of fabricating a graded-index polymer optical fibre comprises preparing a cladding composition, the cladding composition comprising either a mixture of a cladding polymer and a dopant or a mixture of a cladding polymer precursor and a dopant; forming cladding from the cladding composition around a core, the core comprising a core polymer; and causing diffusion of the dopant into the core such that the dopant has a continuous concentration gradient, according to which concentration gradient the concentration of the dopant increases with radial distance from a centre of the core. The dopant is a compound having a refractive index which is lower than a refractive index of the core polymer. By distributing the dopant such that the dopant concentration is lowest at the centre of the core, the optical attenuation of the graded-index polymer optical fibre may be reduced. Also provided is a graded-index polymer optical fibre obtainable by the method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.