OPTICAL FIBER OF MODULATED SPIN FOR REDUCED POLARISATION MODE DISPERSION AS WELL AS PROCESS AND APPARATUS FOR ITS MANUFACTURE

OPTICAL FIBER OF MODULATED SPIN FOR REDUCED POLARISATION MODE DISPERSION AS WELL AS PROCESS AND APPARATUS FOR ITS MANUFACTURE

Disclosed are methods for reducing polarization mode dispersion (PMD) in single mode fiber by spinning the fiber during the drawing process in accordance with a spin function having sufficient harmonic content to achieve low levels of PMD for commercial fibers for which the beat lengths of the fiber...

Ausführliche Beschreibung

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Bibliographische Detailangaben
Hauptverfasser: HENDERSON, DANNY L, WASHBURN, GLENDA R, LI, MING-JUN, NOLAN, DANIEL A
Format: Patent
Sprache:eng ; fre
Schlagworte:
CHEMISTRY
GLASS
MANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
METALLURGY
MINERAL OR SLAG WOOL
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PHYSICS
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Beschreibung
Zusammenfassung:Disclosed are methods for reducing polarization mode dispersion (PMD) in single mode fiber by spinning the fiber during the drawing process in accordance with a spin function having sufficient harmonic content to achieve low levels of PMD for commercial fibers for which the beat lengths of the fibers, including the beat lengths of different portions of the fibers, are available and thus not readily known in advance. The spin functions disclosed take advantage of certain resonances in energy transfer between polarization modes to achieve substantial reductions in PMD for a wide range of beat lengths. Examples of suitable spin functions include frequency-modulated and amplitude-modulated sine waves.