Abstract
A multistep-index (MSI) plastic optical fiber (POF) has been intensively studied as an alternative to high-bandwidth graded-index (GI) POFs during the past decade. The propagation modes in MSI POFs are more complicated than those of GI POFs. We obtain all the propagation modes in MSI large-core highly multimode fibers with a core diameter of by the use of a finite-element method and demonstrate that many modes in MSI fibers have anomalous behavior which cannot be observed in power-law profile fibers. Our numerical results elucidate detailed transmission properties of MSI large-core highly multimode fibers, including the effective index, group delay, mode field, root-mean-square pulse width, and bandwidth.
© 2010 Optical Society of America
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