Abstract

This study investigates the subchannel drop and add operation of a silicon photonic all-optical orthogonal frequency division multiplexing demultiplexer (O-OFDM-DEMUX) circuit. The proposed device consists of two O-OFDM-DEMUX circuits with four subchannels at a frequency spacing of 10 GHz and four $2 \times 2$ Mach–Zehnder interferometer (MZI)-type optical switches for drop and through operations, with another four $2 \times 2$ MZI-type optical switches for add and through operations. A subchannel on–off ratio of over 20 dB was achieved. In addition, a new subchannel was successfully added to the target subchannel, although the shape of the transmissivity spectrum was slightly degraded through the detuning of the spectrum.

© 2020 Optical Society of America

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