Patent · US Expired

Hollow-core optical fiber and method of making same

US7366388B2 · kind B2 · utility

7Cited by

2References

5Claims

0Family size

Assignee

CRYSTAL FIBRE A/S · DK

Inventors

John Roberts · Bolton, US
Hendrik Sabert · Seevetal, DE
Brian Mangan · Hopewell, US
Lance W. Farr · Hereford, GB

Key dates

Filing date	Feb 22, 2005
Grant date	Apr 29, 2008
Priority date	—
Expiry date	Jul 9, 2025

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02P40/57
WIPO fieldOther special machines
WIPO sectorMechanical engineering

Abstract

An optical fiber having a cladding region surrounding a core region having an elongate core hole, the inner or outer surface of the core hole having a surface roughness with a spatial period equal to or less than 5 μm by a spectral power below 0.0017 nm2 μm−1. A method of making an optical fiber including a cladding region having an arrangement of elongate cladding holes in a matrix material, surrounding an elongate core region having an elongate core hole, the method including the step of increasing the surface tension of the matrix material prior to or during the step of heating and drawing the fiber.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.