Abstract
We propose and experimentally demonstrate a compact silicon photonic interleaver based on an interfering loop containing a 1D Fabry–Perot (FP) cavity for coarse wavelength division multiplexing (CWDM) applications. The interleaver consists of a directional coupler and a FP cavity designed to minimize the channel crosstalk. Instead of using an off-chip optical circulator, the reflection light of the interleaver can be separated from the input by placing two identical interleavers in a Mach–Zehnder interferometer (MZI) structure for practical applications. We also study the impacts of fabrication errors of the MZI structure. The fabricated device has a footprint of and a channel spacing of . The maximum crosstalk is in a wavelength range from 1508 nm to 1590 nm.
© 2018 Optical Society of America
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