| 摘要 |
A 1x2 splitter design having low loss is described. The splitter has a non-adiabatic tapered waveguide ( 22 ) connected between a substantially single-mode input waveguide ( 20 ) and two output waveguides ( 24, 26 ). The non-adiabatic tapered waveguide widens in width towards the output waveguide, and merges substantially continuously with the input waveguide in a direction parallel to the optical axis of the input waveguide. This keeps radiation mode generation to a minimum which, in turn, keeps insertion loss low. In the described embodiment, the non-adiabatic taper shape is based on a perturbed cosine function. The 1x2 splitter can be cascaded with other such splitters in order to build a 1x2N splitter design.
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