Abstract
Using the power flow equation, the state of mode coupling in plastic-clad silica fiber and
organic glass-clad PMMA fiber is investigated in this article. Coupling coefficients are
determined by extending our previously reported calculation method to the narrowing beams that are
launched with distributions wider than the corresponding steady state distributions. It was found
that the organic glass-clad PMMA fiber showed stronger mode coupling than the plastic-clad silica
fiber. Consequently, the fiber length for achieving the steady state distribution was shorter for
organic glass-clad PMMA fibers than for plastic-clad silica fibers.
© 2013 IEEE
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