Subchannel drop and add operation by using silicon photonic all-optical orthogonal frequency division multiplexing demultiplexers

摘要

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 x 2 Mach-Zehnder interferometer (MZI)-type optical switches for drop and through operations, with another four 2 x 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. (C) 2020 Optical Society of America