Method of controlling the polarization mode dispersion of an optical fiber during fiber drawing
US7284397B2 · kind B2 · utility
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6Claims
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Key dates
| Filing date | Dec 12, 2003 |
| Grant date | Oct 23, 2007 |
| Priority date | — |
| Expiry date | Jun 26, 2025 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B2205/06
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
An optical fiber drawing installation is equipped with an oscillating pulley that applies torsion to the fiber alternately in one rotation direction and then in the opposite direction. To control the torsion applied to the fiber, images are formed of the fiber and the pulley. The images are analyzed to determine the position of the fiber relative to the pulley. The torsion is calculated from the calculated position, on the assumption that the fiber rolls on the pulley.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.