A new approach to design a wavelength-insensitive optical power splitter is presented. First, a coupled-mode theory is cast in operatorial form. This allows us to solve the equivalent of coupled differential equations as simple limits. The operators are then represented on a generalized Poincaré sphere, and the resulting graphical tool is applied to different structures, giving a clear interpretation of previous results in literature as well as hints on how to find improved solutions.
CITATION STYLE
Cherchi, M. (2003). Wavelength-flattened directional couplers: a geometrical approach. Applied Optics, 42(36), 7141. https://doi.org/10.1364/ao.42.007141
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