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Linear Y-Junctions for Modal Splitting from Periodic Waveguides

J. A. Besley, N. N. Akhmediev, and P. D. Miller
Australian Photonics Cooperative Research Centre
Optical Sciences Centre
Research School of Physical Sciences and Engineering
The Australian National University, Canberra ACT 0200 Australia


We propose a Y-junction device for splitting the two Floquet modes of a periodic waveguide. Although the junction is a passive, linear device, it is designed using nonlinear techniques. It acts as a standard modal splitter in a multimode slab waveguide, but in this case the input modes are degenerate.