Abstract
In this paper we report on a four-channel optical add-drop multiplexer based on dual racetrack micro-ring resonators in submicron SOI rib waveguides. The free spectral range (FSR) is about 18.6nm. The device can add/drop four optical channels in half C-band. When the device acts as an optical drop multiplexer, the channel spacing is about 1.5nm, maximum extinction ratio is 23.75dB, the minimum insertion loss 9.94dB and the maximum adjacent channels crosstalk is −12.12dB. When the device acts as an optical add multiplexer, the maximum extinction ratio is 28.72dB and the minimum insertion loss 7.35dB. The fabricated device has effectively and perfectly realized the signals upload and download.
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