Optical waveguides – Optical fiber waveguide with cladding
Patent
1997-01-21
1999-08-24
Palmer, Phan T.H.
Optical waveguides
Optical fiber waveguide with cladding
385124, 385128, 65402, 65438, G02B 602
Patent
active
059434660
ABSTRACT:
The invention provides improved 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 variable and thus not readily known in advance. The spin functions of the invention 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.
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Henderson Danny L.
Li Ming-Jun
Nolan Daniel A.
Washburn Glenda R.
Berdan David L.
Corning Incorporated
Palmer Phan T.H.
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