13 February 2016 On-chip mode division multiplexing technologies
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Space division multiplexing (SDM) is currently widely investigated in order to provide enhanced capacity thanks to the utilization of space as a new degree of multiplexing freedom in both optical fiber communication and on-chip interconnects. Basic components allowing the processing of spatial modes are critical for SDM applications. Here we present such building blocks implemented on the silicon-on-insulator (SOI) platform. These include fabrication tolerant wideband (de)multiplexers, ultra-compact mode converters and (de)multiplexers designed by topology optimization, and mode filters using one-dimensional (1D) photonic crystal silicon waveguides. We furthermore use the fabricated devices to demonstrate on-chip point-to-point mode division multiplexing transmission, and all-optical signal processing by mode-selective wavelength conversion. Finally, we report an efficient silicon photonic integrated circuit mode (de)multiplexer for few-mode fibers (FMFs).
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Yunhong Ding, Yunhong Ding, Louise F. Frellsen, Louise F. Frellsen, Xiaowei Guan, Xiaowei Guan, Jing Xu, Jing Xu, Francesco Da Ros, Francesco Da Ros, Haiyan Ou, Haiyan Ou, Christophe Peucheret, Christophe Peucheret, Lars H. Frandsen, Lars H. Frandsen, Leif Katsuo Oxenløwe, Leif Katsuo Oxenløwe, Kresten Yvind, Kresten Yvind, "On-chip mode division multiplexing technologies", Proc. SPIE 9774, Next-Generation Optical Communication: Components, Sub-Systems, and Systems V, 977407 (13 February 2016); doi: 10.1117/12.2211596; https://doi.org/10.1117/12.2211596

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