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. 2017 Jan 25;8:14080. doi: 10.1038/ncomms14080

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Copyright © 2017, The Author(s)

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(a) Efficiency of core-to-SPAD coupling for a single core as a function of magnification. An efficiency of 1 indicates all of the light from the core falls within the active area of the SPAD. (b) A visual representation of how the MCF cores could be imaged to the perfectly square array of SPADs to achieve optimum coupling. The sizes of the symbols do not represent the physical sizes of the MCF modes or the SPADs.