Processing

Please wait...

Settings

Settings

Goto Application

1. WO1997026221 - OPTICAL FIBEROF MODULATED SPIN FOR REDUCED POLARISATION MODE DISPERSION AS WELL AS PROCESS AND APPARATUS FOR ITS MANUFACTURE

Publication Number WO/1997/026221
Publication Date 24.07.1997
International Application No. PCT/US1997/000605
International Filing Date 21.01.1997
Chapter 2 Demand Filed 18.06.1997
IPC
C03B 37/027 2006.01
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
37Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
01Manufacture of glass fibres or filaments
02by drawing or extruding
025from reheated softened tubes, rods, fibres or filaments
027Fibres composed of different sorts of glass, e.g. fibre optics
C03B 37/03 2006.01
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL; SUPPLEMENTARY PROCESSES IN THE MANUFACTURE OR SHAPING OF GLASS, OR OF MINERAL OR SLAG WOOL
37Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
01Manufacture of glass fibres or filaments
02by drawing or extruding
03Drawing means, e.g. drawing drums
CPC
C03B 2203/06
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
2203Fibre product details, e.g. structure, shape
02External structure or shape details
06Axial perturbations, e.g. twist, by torsion, undulating, crimped
C03B 2203/18
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
2203Fibre product details, e.g. structure, shape
10Internal structure or shape details
18Axial perturbations, e.g. in refractive index or composition
C03B 2203/20
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
2203Fibre product details, e.g. structure, shape
10Internal structure or shape details
18Axial perturbations, e.g. in refractive index or composition
20helical
C03B 2203/36
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
2203Fibre product details, e.g. structure, shape
36Dispersion modified fibres, e.g. wavelength or polarisation shifted, flattened or compensating fibres (DSF, DFF, DCF)
C03B 2205/06
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
2205Fibre drawing or extruding details
06Rotating the fibre fibre about its longitudinal axis
C03B 37/027
CCHEMISTRY; METALLURGY
03GLASS; MINERAL OR SLAG WOOL
BMANUFACTURE, SHAPING, OR SUPPLEMENTARY PROCESSES
37Manufacture or treatment of flakes, fibres, or filaments from softened glass, minerals, or slags
01Manufacture of glass fibres or filaments
02by drawing or extruding, ; e.g. direct drawing of molten glass from nozzles; Cooling fins therefor
025from reheated softened tubes, rods, fibres or filaments ; , e.g. drawing fibres from preforms
027Fibres composed of different sorts of glass, ; e.g. glass optical fibres
Applicants
  • CORNING INCORPORATED [US]/[US]
Inventors
  • HENDERSON, Danny, L.
  • LI, Ming-Jun
  • NOLAN, Daniel, A.
  • WASHBURN, Glenda, R.
Agents
  • HERZFELD, Alexander, R.
Priority Data
60/010,37622.01.1996US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) OPTICAL FIBEROF MODULATED SPIN FOR REDUCED POLARISATION MODE DISPERSION AS WELL AS PROCESS AND APPARATUS FOR ITS MANUFACTURE
(FR) FIBRE OPTIQUE A SPIN MODULE POUR DISPERSION EN MODE DE POLARISATION REDUITE AINSI QUE PROCEDE ET APPAREIL POUR SA FABRICATION
Abstract
(EN)
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.
(FR)
Cette invention se rapporte à des procédés pour réduire la dispersion en mode de polarisation (DMD) dans une fibre monomode, en imprimant à ladite fibre pendant le processus d'étirage un spin qui dépend d'une fonction de spin ayant un contenu en harmoniques suffisant pour produire des niveaux faibles de DMP pour des fibres commerciales pour lesquelles les longueurs de battement des fibres, y compris des longueurs de battement de différentes parties des fibres, sont disponibles et, par conséquent, difficilement connues à l'avance. Les fonctions de spin présentées tirent profit de certaines résonances dans le transfert d'énergie entre les modes de polarisation, pour produire des réductions substantielles de la DMP pour une large gamme de longueurs de battement. Comme exemples de fonctions de spin appropriées, on trouve des ondes sinusoïdales modulées en fréquence et modulées en amplitude.
Latest bibliographic data on file with the International Bureau