Method of controlling the polarization mode dispersion of an...

Details Method of controlling the polarization mode dispersion of an... Method of controlling the polarization mode dispersion of an...

2007-10-23

2007-10-23

Griffin, Steven P. (Department: 1731)

Glass manufacturing

Processes of manufacturing fibers, filaments, or preforms

With measuring, controlling, sensing, programming, timing,...

C065S381000, C065S402000, C065S438000, C065S484000

Reexamination Certificate

active

10733639

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.

REFERENCES:
patent: 2004/0042747 (2004-03-01), Kim et al.
patent: 1 258 751 (2002-11-01), None
patent: WO 00/69782 (2000-11-01), None

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