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Appl Opt. 2012 May 20;51(15):2778-83. doi: 10.1364/AO.51.002778.

Design of mode-sorting asymmetric Y-junctions.

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  • 1Research School of Physics and Engineering, The Australian National University, ACT 0200, Australia.


The theory of mode-sorting in bimodal asymmetric Y-junctions is extended to multimode asymmetric Y-junctions with multiple output arms. This theory allows for the optimization of these mode-sorting planar structures. Asymmetric Y-junctions provide unique opportunities for spatial mode division multiplexing (MDM) of optical fiber. Spatial MDM is considered paramount to overcoming the bandwidth limitations of single-mode fiber. The design criteria presented in this paper facilitate their design.

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