| 摘要 |
Segmentation is used not only in the grating side of a star coupler, but also on the input/output side of a star coupler, in order to minimize the amount of light that is lost. Thus, our invention is to place segmentation in the input and/or output ports of optical planar waveguide grating routers with high spectral sampling, for the purpose reducing insertion loss. In one embodiment, the star couplers in the waveguide grating router are arranged with segmentation on both input and output sides; alternatively, segmentation is used only on either the input or output side of the star coupler.
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