Design and applications of planar waveguide interleaving filters

Three different structures of planar waveguide interleavers are discussed in detail with comparison: Mach-Zehnder interferometer, Mach-Zehnder interferometer with a ring resonator, and AWG(arrayed waveguide grating) . Further, we demonstrated a 1:4 AWG-based interleaver with 50GHz channel spacing, flatten passband and low channel crosstalk can be achieved by proper design.

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