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In this paper, the multimode waveguide lengths and the output port locations of a SOI (silicon on insulator) material-based 1x4 MMI (multimode interference) optical splitter are optimized by means of FD-BPM (finite difference - beam propaga- tion method). An improved 1x4 MMI optical splitter is designed. Compared with an usual optical splitter, a smaller loss 0. 12dB and a better output port power uniformity 0.11dB are achieved for the optical signal transmission.
In this paper, the multimode waveguide lengths and the output port locations of a SOI (silicon on insulator) material-based 1x4 MMI (multimode interference) optical splitters are optimized by means of FD-BPM (finite difference-beam propaga- tion method) An improved 1x4 MMI optical splitter is designed. Compared with an ordinary optical splitter, a smaller loss 0. 12dB and a better output port power uniformity 0.11dB are achieved for the optical signal transmission.