1 May 2014 A novel wavelength multiplexer/demutiplexer based on side-port multimode interference coupler
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Based on side-port multimode interference coupler, a novel design of 1.31/1.55-μm wavelength multiplexer/demutiplexer on SOI platform with conventional channel waveguides is proposed and analyzed by using wide-angle beam propagation method. With a 25.9μm long ultra-short MMI section, nearly an order of magnitude shorter than that of the previously reported 1.31/1.55-μm wavelength MMI splitters on SOI, simulation results exhibit contrasts of 28dB and 25dB at wavelength 1.31 and 1.55 μm, respectively, and the insertion losses are both below 0.55dB. Meanwhile, the analysis shows that the proposed structure has larger fabrication tolerances than restricted MMI based structures and the present design methodology also applies to split other wavelengths and in different material platforms, such as InP, GaAs and PLC guides, etc.
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Shile Wei, Shile Wei, Wu Jian, Wu Jian, Lingjuan Zhao, Lingjuan Zhao, Jifang Qiu, Jifang Qiu, Zuoshan Yin, Zuoshan Yin, Rongqing Hui, Rongqing Hui, "A novel wavelength multiplexer/demutiplexer based on side-port multimode interference coupler", Proc. SPIE 9133, Silicon Photonics and Photonic Integrated Circuits IV, 91330Y (1 May 2014); doi: 10.1117/12.2051849; https://doi.org/10.1117/12.2051849

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