Abstract
This paper presents an investigation on a single-mode–multimode–single-mode
fiber structure. A one-way guided-mode propagation analysis for the circular
symmetry waveguide is employed to model the light propagation and the approximated
formulations are derived and evaluated concerning the accuracy. Phase conjunction
of the multimode interference within the fiber structure is revealed. A simple
way to predict and analyze the spectral response of the structure
is presented through the space to wavelength mapping with the derived approximated
formulations. The prediction of spectral response is verified numerically
and experimentally.
© 2008 IEEE
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