专利名称：Frequency and amplitude modulated fiber
spins for PMD reduction
发明人：Danny L. Henderson,Ming-Jun Li,Daniel A.
Nolan,Glenda R. Washburn
申请号：US09306470申请日：19990506公开号：US06240748B1公开日：20010605
专利附图：
摘要：The invention provides improved methods for reducing polarization modedispersion (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 ofPMD for commercial fibers for which the beat lengths of the fibers, including the beatlengths of different portions of the fibers, are variable and thus not readily known inadvance. The spin functions of the invention take advantage of certain resonances inenergy transfer between polarization modes to achieve substantial reductions in PMD fora wide range of beat lengths. Examples of suitable spin functions include frequency-modulated and amplitude-modulated sine waves.
申请人：CORNING INCORPORATED
代理人：William J. Chervenak,Timothy R. Krogh
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