Hexagonal tube stacking method for the fabrication of hollow core photonic band gap fibers and preforms
US9416042B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 6, 2010 |
| Grant date | Aug 16, 2016 |
| Priority date | — |
| Expiry date | Aug 27, 2031 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG02B6/02347
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
The present invention is generally directed to a method of making a hollow-core photonic band gap preform from a specialty glass by pressing a specialty glass through a die to form a tube wherein the outer transverse shape of the tube is a hexagon, triangle, quadrilateral, or other polygon; stretching the tube to form a micro-tube with approximately the same outer transverse shape as the tube; stacking a plurality of micro-tubes into a bundle minimizing voids between adjacent micro-tubes and forming a central longitudinal void wherein the plurality of micro-tubes within the bundle comprise an inner structured region of the preform and the central void of the bundle comprises a hollow core in the preform; and inserting the bundle into a jacket tube. Also disclosed are the hollow-core photonic band gap preform and fiber formed by this method.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.